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Texas Department of Transportation GEOPAK Drainage Training Course For G E O P A K V8i Civil Design Software Training Code: DES738 October 2012 Copyright © 2012 by Texas Department of Transportation

Transcript of Geopak Drainage v8i

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Texas Department of Transportation

GEOPAK Drainage

Training CourseFor

G E O P A K V8iC i v i l D e s i g n S o f t w a r e

Training Code: DES738

October 2012Copyright © 2012 by Texas Department of Transportation

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Table of Contents

G E O P A K D R A I N A G E T e x a s D e p a r t m e n t o f T r a n s p o r t a t i o n10/9/12

CHAPTER 1 Introduction to Geopak Drainage . . . . . . . . . . . . . . . . . 1-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Project Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Drainage Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Accessing Geopak Drainage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Creating a Drainage Project . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 The Drainage Library (*.dlb). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5

CHAPTER 2 Project Preferences . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1 Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 Project Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 Rainfall Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4 Land Use Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6 Frequency Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7 Intensity Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8 Junction Losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9 Inlet Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10 Node Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 Link Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12 Profile Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13 Plan Symbology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15 Updates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16 Save Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17Drainage Preference File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18 Save Drainage Project. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19Exit Drainage Project . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19

CHAPTER 3 Drainage Design-Nodes and Areas . . . . . . . . . . . . . . . 3-1Introduction to Nodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1Introduction to Drainage Areas. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1Delineation of Subareas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 Class Exercise: Delineation of Subareas . . . . . . . . . . . . . . . . . . 3-3 Individual Exercise: Delineation of Subareas Handout . . . . . . . 3-9 Class Exercise: On-Grade Curb Inlet and Drainage Area . . . . 3-10 Class Exercise: Sag Curb Inlet and Drainage Area . . . . . . . . . 3-19 Individual Exercise: Nodes and Areas Handout . . . . . . . . . . . . 3-27 Class Exercise: Outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-28

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CHAPTER 4 Conveyance System-Links . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 Class Exercise: Drainage Link. . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 Individual Exercise: Links Handout . . . . . . . . . . . . . . . . . . . . . 4-7

CHAPTER 5 Network-System Creation . . . . . . . . . . . . . . . . . . . . . . . 5-1Introduction to Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 Class Exercise: Network (System Creation) . . . . . . . . . . . . . . . 5-2 Introduction to Computations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5Introduction to Active Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

CHAPTER 6 Drainage Profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1Introduction to Drainage Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1Profile Preference File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 Class Exercise: Drainage Profile . . . . . . . . . . . . . . . . . . . . . . . . 6-2 Individual Exercise: Drainage Profile Handout . . . . . . . . . . . . 6-10Introduction to Drainage Automated Profile Builder . . . . . . . . . . . 6-11 Class Exercise: Automatic Create Profile. . . . . . . . . . . . . . . . . 6-12 Individual Exercise: Automatic Create Profile Handout . . . . . 6-15 Class Exercise: Drainage Profile-Project to Chain . . . . . . . . . . 6-16

CHAPTER 7 System Modification and Analysis . . . . . . . . . . . . . . . . 7-1Examples of System Modifications . . . . . . . . . . . . . . . . . . . . . . . . . 7-1 Class Exercise: Link and Drainage Profile Adjustment . . . . . . . 7-4 Class Exercise: Analyze a 100 Year Storm on Network . . . . . . 7-6 Class Exercise: Compute TC . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8

CHAPTER 8 Drainage Navigator . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1Introduction to Navigator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1Introduction to Global Editor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2 Class Exercise: Batch Editing with Global Editor . . . . . . . . . . . 8-3Introduction to Query . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5

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Class Exercise: Querying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-6 Individual Exercise: Querying . . . . . . . . . . . . . . . . . . . . . . . . . . 8-8

CHAPTER 9 Drainage Reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1Standard Drainage Reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2Drainage Report Builder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3 Class Exercise: Drainage Report Builder . . . . . . . . . . . . . . . . . . 9-4

CHAPTER 10Drainage Plan View Labeler . . . . . . . . . . . . . . . . . . 10-1Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1 Class Exercise: Drainage Labeler . . . . . . . . . . . . . . . . . . . . . . . 10-2 Individual Exercise: Drainage Labeler Handout . . . . . . . . . . . 10-9Labeler Updater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-10

CHAPTER 11Automated Quantities . . . . . . . . . . . . . . . . . . . . . . . . 11-1Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1 Class Exercise: Automated Quantities . . . . . . . . . . . . . . . . . . . 11-2

CHAPTER 12Node Creation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1 Class Exercise: Node Creation . . . . . . . . . . . . . . . . . . . . . . . . . 12-2

CHAPTER 13DTM Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-1Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-1Analysis Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-2 Height/Slope Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-2 Profile Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-3 Class Exercise: Profile Tool . . . . . . . . . . . . . . . . . . . . . . . . 13-5 Trench Volumes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-9Drainage Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-10 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-11

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Delineate All Watersheds . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-12 Class Exercise: Delineate All Watersheds. . . . . . . . . . . . . 13-13 Delineate Watershed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-15 Drainage Patterns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-16 Downstream Trace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-17 Upstream Trace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-18 Flow Arrows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-18 Delineate Low Points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-19 Delineate High Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-19 Ridge Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-20 Sump Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-20 Surface Ponds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-21 Pond Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-22 Class Exercise: Pond Analysis. . . . . . . . . . . . . . . . . . . . . . 13-23DEM Maps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-25

CHAPTER 14Culverts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-1Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-1 Class Exercise: Culvert-culv1. . . . . . . . . . . . . . . . . . . . . . . . . . 14-3 Class Exercise: Culvert-culv2. . . . . . . . . . . . . . . . . . . . . . . . . 14-20

CHAPTER 15Comprehensive Exercise . . . . . . . . . . . . . . . . . . . . . . . 15-1

This training course document was designed and is maintained by the Engineering Solutions Delivery and Support Services Branch of the Technology Services Division; Texas Department of Transportation

November 28, 2011

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1 INTRODUCTION TO GEOPAK DRAINAGE

1.1 Introduction

GEOPAK Drainage is a comprehensive system for designing and analyzing storm drain systems and culverts with a workflow following conventional design processes. GEOPAK Drainage will design the surface collection system and the conveyance system, while being a true interactive design tool. The software can work with GEOPAK Road or without and works within the Microstation graphical environment. It allows the designer to see the design as it is being created. GEOPAK Drainage can do both the hydrologic and hydraulic design, as well as the plan production graphics.

GEOPAK Drainage will incorporate the Road information that the designer may already have, such as alignments, profiles, TINs, etc., directly into the drainage design. Any changes to the road design can be reflected in the drainage design. This allows for ease of modifications whether to the road or drainage design. As an inlet is placed or moved, the station, offset, and elevation is seen at that moment.

GEOPAK Drainage uses recommended methodologies from FHWA and AASHTO. All of the methodologies that the software uses are explained in the Technical Reference section of the Help Files.

For questions about GEOPAK Drainage, including a detailed discussion of the specific hydraulic algorithms and formulas used go to the Help Files. From the Microstation pull-downs, Applications > GEOPAK > Drainage > Help, or on most workstations, press the F1 key on the standard keyboard, while having an active dialog box.

Note: Picture representations presented in this manual are for example only and may not represent how every project should be set up. This manual is to demonstrate the GEOPAK Drainage software and not to teach hydraulics and hydrology.

1.2 Project Components

The GEOPAK Drainage File (*.gdf) is a binary file containing all the hydraulic information about the drainage system. Each GEOPAK Drainage File (*.gdf) is a Drainage Project. A GEOPAK Drainage File contains Preferences, which include hydrologic and hydraulic options, visualization symbologies, and references to the Drainage Library file, cell library file, and GEOPAK Road files. All spatial data, connectivity and hydraulic properties for each drainage feature are stored in this external file.

The Drainage Library File (*.dlb) contains the standards for the Agency, District or office and can

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CHAPTER 1 Introduction to GEOPAK DrainageDrainage Components

be used on all projects. It contains the Rainfall Parameters, Land Use symbology tables, Node types, pipe configurations and standard Spread Sections. An example is TxDOT_V8i.dlb, located at C:\Engapps\TXDOTGPK\Drainage.

The Drainage Cell Library File (*.cel) contains the Microstation cells that are used for the Nodes in the Drainage Library Fi le . An example is TxDOT_V8iDrain .cel , located a t C:\Engapps\TXDOTGPK\Drainage.

The Design and Computation Manager Database (*.ddb) contains the PAYITEMS that corre-spond with the Nodes and Links in the Drainage Library File. An example is TxDOT_V8iDrain.ddb, located at C:\Engapps\TXDOTGPK\DDB.

The Microstation Design File (*.dgn) is a two dimensional graphics file for the visualization of the drainage project.

1.3 Drainage Components

Nodes: A Node is a set point with a user defined location, such as an inlet, manhole, or outfall.

Links: A Link can be a pipe or ditch and connects two Nodes, from upstream to downstream.

Networks: A Network is a system of Nodes and Links with a single Outfall. A Project can have any number of Networks.

Drainage Areas: A drainage area can be represented by a closed boundary or by a keyed-in value. A drainage area can have multiple sub-areas. There is a one to one relationship between the Area and the Node. This means the Area ID or name MUST match the Node ID or name. An example: Drainage Area A1 MUST match Node A1.

1.4 Accessing GEOPAK Drainage

Upon entering a two dimensional Microstation file, on the Microstation menu bar, navigate to Applications > GEOPAK > Activate GEOPAK. This will activate the available GEOPAK applications.To invoke Drainage, select Applications > GEOPAK > Drainage > Drainage. When Drainage has been activated, you will notice several changes. Across the Microstation header, after the file name, you will notice – Drainage: Untitled – Network: None. Across the Microstation menu bar, you will notice a Drainage pull-down has been inserted between Applications and Window. You will also see a new, separate, Drainage menu bar appear. This menu bar can be docked, minimized, or moved to an appropriate location.

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CHAPTER 1 Introduction to GEOPAK DrainageAccessing GEOPAK Drainage

Before Drainage is invoked

After Drainage is invoked

Drainage Menu Bar

The GEOPAK Drainage tools can be accessed from the Drainage pull-down, from the Drainage menu bar, or from the Drainage Tool Box, which can be invoked from Tool Boxes > Main. All Drainage tools are located in all three locations. The Main Drainage Tool Box can be resized, docked, or customized.

Main Drainage Tool Box

GEOPAK Drainage ALWAYS STARTS in an “Untitled” project, as seen below.

Every time GEOPAK Drainage is activated, it will come up “Untitled”, even if a User had previously created or opened a Drainage Project.

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CHAPTER 1 Introduction to GEOPAK DrainageCreating a Drainage Project

1.4.1 Creating a Drainage Project

From the Microstation pull-down: Drainage > Project > New

From the Drainage Menu Bar: Project > New

From the Main Drainage Tool Palette

Type in the name of the new Project, this will create the GEOPAK Drainage File (*.gdf) in the selected directory location.

After a Project has been created, the Microstation header will show the new Project name instead of Untitled.

Remember, if GEOPAK Drainage is closed, when Drainage is re-activated, a project will have to be

opened.

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CHAPTER 1 Introduction to GEOPAK Drainage The Drainage Library (*.dlb)

1.4.1.1 The Drainage Library (*.dlb)

The Drainage Library contains the standards and data that can be used on all projects and by all designers. Each Drainage Project simply accesses the Drainage Library. The standard Drainage Library is TxDOT_V8i.dlb, and is located at C:\Engapps\TXDOTGPK\Drainage. Some Districts or offices have their own drainage libraries.

From the Microstation pull-down: Drainage > Project > Drainage Library

From the Drainage Menu Bar: Project > Drainage Library

From the Main Drainage Tool Palette

TxDOT_V8i.dlb

The Drainage Library has five tabs representing the categories supported; Rainfall, Land Use, Nodes, Links, and Spread Section.

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CHAPTER 1 Introduction to GEOPAK Drainage The Drainage Library (*.dlb)

Typical for GEOPAK Drainage are the dialog buttons on the side panel. For the Drainage Library, they are, from top to bottom, Add Library Item, Modify Library Item, Cut Library Item, Copy Library Item, and Report Library Item.

Rainfall: Under the Rainfall tab are the rainfall data sources that can be used on the Drainage Projects. GEOPAK Drainage supports intensity duration frequency tables, SCS methods, or preset intensity duration equation formats. Some of these are preset for the designer, such as the Rational Method intensity equations for all counties in the state of Texas; others can be imported by the designer, if so desired.

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CHAPTER 1 Introduction to GEOPAK Drainage The Drainage Library (*.dlb)

Land Use: Under the Land Use tab are the stored runoff coefficients, C values, and corresponding graphical symbology for each land use description. The software can be used to automatically delineate the drainage sub-areas and apply a coefficient value to the matching graphical symbology.

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CHAPTER 1 Introduction to GEOPAK Drainage The Drainage Library (*.dlb)

The Land Use is an option that the designer has, it is not required. There is a Land Use Boundary Tool that will help the designer create or convert Microstation elements to the correct symbology. The elements must be Microstation Shapes.

From the Microstation pull-down: Drainage > Component > Land UsesFrom the Drainage Menu Bar: Component > Land UsesFrom the Main Drainage Tool Palette: Land Uses

Nodes: Under the Nodes tab are the standard configurations for Curb Inlets, Grates, Junctions, Slotted Drains, Outlets, Headwalls, and Other Nodes. For each Node are stored description, plan view cell, and dimensional information. The software uses this for its calculations. Designers can create their own Nodes; this will be explained in a later chapter.

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CHAPTER 1 Introduction to GEOPAK Drainage The Drainage Library (*.dlb)

Links: Under the Links tab are the standard configurations for pipes and boxes. Each Link is categorized by Shape, Material, and Type. The Shapes available are Arch, Box, Circular, Ellipse, and Pipe-Arch. The Materials available are Aluminum, Concrete, Plastic, and Steel. The Type is the corrugations. Not all of these items are typical for TxDOT projects. Designers can create their own Links.

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CHAPTER 1 Introduction to GEOPAK Drainage The Drainage Library (*.dlb)

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CHAPTER 1 Introduction to GEOPAK Drainage The Drainage Library (*.dlb)

Spread Section: Under the Spread Section tab are example cross sections that can be used on Drainage Projects. Having a Spread Section stored in the Drainage Library is an option and is not required, but it allows the user the flexibility to recall the same section for repetitive placement. Project specific sections can be added with Width, % Slope, and Manning’s N required. A picture of a Spread Section is in the Help Files under, Command Reference > Component > Nodes > Spread Criteria > Optional Spread.

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2 PROJECT PREFERENCES

2.1 Class Project Setup

Introduction

The Project Preferences control the computational and graphical options of the Drainage project. A wide variety of Preferences enable the designer to set project specific options, or an office can set parameters to maintain standards. The Preferences are a one time set up, but can be changed at any time if a system needs to be redesigned or a different set of preferences need to be analyzed.

From the Microstation pull-down: Drainage > Project > Preferences

From the Drainage Menu Bar: Project > Preferences

From the Main Drainage Tool Palette

Options are listed on the left side of the dialog box, while on the right side are the parameters that go with the corresponding Option. The designer will navigate through the Options to set up the Project. A new feature in this version is the ability to Save the Preferences into a Drainage Preference File (.dpf) for later recall or to load into a different Project. A District or office may set

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CHAPTER 2 Project PreferencesUnits

up a standard Drainage Preference File to use on all their Drainage projects. Also, under Drainage > Project > Export, is the ability to export out the Preferences into an ASCII file.

For the remainder of this chapter, we will look at the different Options, but for a more detailed description, go to the Help files, located under the Microstation pull down at Applications > GEOPAK > Drainage > Help or the F1 key.As we look at the Preferences, we will also be setting up the Preferences for the first class project.

2.2 Units

Two options are supported, English and Metric. Mixed Units are not supported. It is either English or Metric. If GEOPAK Road is being used, it must use the same Units. The Units listed, Length, Depth, Discharge, etc, are for information only and can not be changed. Dimension is in feet, so a pipe diameter is in feet and not inches. Example: a 24” pipe is a 2’ pipe.

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CHAPTER 2 Project PreferencesProject Components

2.3 Project Components

The Project Components defines the locations of the files used by the Drainage Project.

Drainage Library File (DLB): This is the Drainage Library File that will be used on the Project. It can be located in the project working directory or at a central server location for all to access. The default setting is the Bentley Drainage Library. For this class, we will use C:\Engapps\TXDOTGPK\Drainage\TxDOT_V8i.dlb.

GPK Job Number: This is the GEOPAK Road job number. The GPK is a binary file where the GEOPAK Road COGO is stored. This is optional for Drainage. It is required only if Road information is to be used. If a Road Project is attached, the Select button will locate the job number. The select button is the magnifying glass icon. If a Road Project is not attached, the Working Directory may need to be located under the User Preference tab. For this class, we will use GPK Job Number 97.

User Preferences: This is the User Preferences for the GEOPAK Road Project.

Drainage Cell Library: This is the cell library that contains the Microstation cells that are used for the Nodes in the Drainage Library File. The default setting is the Bentley Cell Library. For this class, we will use C:\Engapps\TXDOTGPK\Drainage\TxDOT_V8iDrain.cel.

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CHAPTER 2 Project PreferencesRainfall Parameters

Criteria Directory: This is the location of the Road criteria files for drawing Drainage features on to cross-sections. This is optional. These criteria files are not supplied by TxDOT. This will not be used in this class.

DDB: This is the Design and Computation Manager database that matches the pay items that are in the Drainage Library File.For this class, we will use C:\Engapps\TXDOTGPK\DDB\TxDOT_V8iDrain.ddb.

Water and Sewer Project: This is for a GEOPAK Water and Sewer Project, a .gws file. This is optional. This will not be used in this class.

Superelevation Shapes File: This is an option that allows the Road Shape file to be leveraged into Drainage for elevations, cross slopes, and grades. For this class, we will use C:\Engdata\v8i_drainageclass\v8i_class\super.dgn.

Site Project: This is an option that allows GEOPAK Site to be leveraged into Drainage. The toggle must be activated and a directory location selected. This will not be used in this class.

Original Ground: This is used for displaying the original ground on the profiles. A Road TIN file, Site Model, or Site Object can be selected. This only applies to the profiles, and is optional.For this class, we will use C:\Engdata\v8i_drainageclass\v8i_class\topo.tin. Design Surface: This is used for displaying the design surface on the profiles. A Road TIN file, Site Model, or Site Object can be selected. This only applies to the profiles, and is optional.For this class, we will use C:\Engdata\v8i_drainageclass\v8i_class\design.tin.

2.4.1 Rainfall Parameters

The Rainfall Parameters Option establishes the Rainfall Sources that will be used on the Project. These come from the Drainage Library that was selected under the Project Components and are used for computing the intensities and discharges.

Rational Method Rainfall Source: If the Rational Method is being used, this is where the Rainfall Source is selected, usually a county. For this class, we will use Palo Pinto.

SCS Method Rainfall Source: If the SCS is being used, this is where the Rainfall Source is selected and the Antecedent Moisture Condition. The Hydrograph Time Interval is in minutes.

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CHAPTER 2 Project PreferencesRainfall Parameters

For this class, we will not be using the SCS Method.

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CHAPTER 2 Project PreferencesLand Use Options

2.4.2 Land Use Options

This Option allows for the selection of the Land Use File or Files that may be used on this Project. A Land Use File can be selected for the Rational Method, SCS Method, or both. Land Use Files are stored in the Drainage Library.For this class, we will use TxDOT Land Use for the Rational Method. We will not be using the SCS Method in this class.

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CHAPTER 2 Project PreferencesFrequency Options

2.4.3 Frequency Options

This Option establishes the frequency at which the discharge computations will be made on the project. Different year storm frequencies can be computed, but not simultaneously. So for each desired frequency, a Design or Analyze must be performed on the Network, and then the next desired frequency must be selected in the Preferences, and the same steps repeated. The Drainage Library used and location is shown at the top. This is the Drainage Library that is set in the Project Components. The Computation Frequency and Cumulative Frequency are from the Drainage Library and can only be modified in the Drainage Library. A Runoff Coefficient Peaking Factor can be applied to the runoff computations.

For a more detailed explanation concerning Frequency Options, a User can go to the Help Files. From the Microstation pull-downs, Applications > GEOPAK > Drainage > Help, or on most workstations, highlight or make active the dialog box and press the F1 key on the standard keyboard.

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CHAPTER 2 Project PreferencesFrequency Options Intensity Option

2.4.3.1 Intensity OptionThis Option establishes the intensity computation options that will be used on the project. The set up of the Intensity Option can be project specific or the set up can be a standard set by a District or office.

Drainage Library (DLB): This is the Drainage Library used on the Project and location.The Drainage Library is set in the Project Components.

Minimum Time of Concentration: Specified in minutes, this is the minimum used throughout the

discharge computations.

Accumulate Pipe Flow Time by: Three options are available to adjust the travel time through the pipes.

Intensity Options: This allows for the use of the computed intensities from the Rainfall Parameters or for a constant intensity, specified in in/hr or mm/hr, depending on the Project Units, to override the values from the Drainage Library. The Weight Time of Concentration, when toggled on, will prevent discharge from decreasing.

Inlet Computation Only: If toggled on, this allows a constant intensity to override the values from the Drainage Library. It is specified in in/hr or mm/hr, depending on the Project Units.

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CHAPTER 2 Project PreferencesFrequency Options Junction Losses

2.4.3.2 Junction LossesThis Option establishes the Junction Losses, the equations and coefficients used in the link calculations that will be used on the project. A Loss Coefficient can be entered next to the Description. In three cases a methodology, either Modern Sewer Design or AASHTO, can be selected. If Disable All Junction Loss Computations is toggled on, it will be applied to the entire Project. If individual junction losses need to be disabled or overridden, this can be done under Node Configuration – Junction Loss. This will be shown in a later chapter.

For a detailed discussion of the specific hydraulic algorithms and formulas used go to the Help Files. From the Microstation pull-downs, Applications > GEOPAK > Drainage > Help, or on most workstations, highlight or make active the dialog box and press the F1 key on the standard keyboard.

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CHAPTER 2 Project PreferencesFrequency Options Inlet Options

2.4.3.3 Inlet OptionsThis Option establishes the default inlet variables that will be used throughout the project. The set up of the Inlet Options can be project specific or the set up can be a standard set by a District or office. Extend Superelevation Shapes to Inlet at Shape Slope, if toggled on, allows for the slope from the shape to be projected out to a Node that is placed outside the width of the shape. The shape file is the design file set for Superelevation Shapes File in the Project Components. For this class, toggle on Extend Superelevation Shapes to Inlet at Shape Slope.

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CHAPTER 2 Project PreferencesFrequency Options Inlet Options

2.4.3.4 Node OptionsThis Option establishes the default node variables that will be used throughout the project.

Default Node ID Prefix: For the node naming convention, a prefix can be given to automatically and repeatedly name the nodes. The nodes will be numerically sequenced by one. An example is MH-1, followed by MH-2, followed by MH-3, etc. If no prefix is given, the node name will be 1, followed by 2, followed by 3, etc. The Default Node ID Prefix can be changed at any time. Node names can also be given when nodes are placed.

Scale Node Cells: If toggled on, a scale can be given to adjust the size of the node cell.

Minimum Freeboard: This is the minimum depth from the node elevation to the hydraulic grade line. If the hydraulic grade line goes above this value, a warning will be given during the Design or Analyze process.

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CHAPTER 2 Project PreferencesLink Options Inlet Options

2.4.4 Link Options

This Option establishes the default link variables that will be used throughout the project. The set up of the Link Options can be project specific or the set up can be a standard set by a District or office.

Default Link ID Prefix: For the link naming convention, a prefix can be given to automatically and repeatedly name the links. The links will be numerically sequenced by one. An example is ss-1, followed by ss-2, followed by ss-3, etc. If no prefix is given, the link name will be 1, followed by 2, followed by 3, etc. The Default Link ID Prefix can be changed at any time. Link names can also be given when links are created.

Link Profile Options: A Design Optimization and an Elevation Option must be selected. The program develops a pipe profile envelope which represents the minimum soffit elevation and the maximum invert elevation for each link. This is derived from an evaluation of the constraints placed on the system. The User must select either Minimize Pipe Size or Minimize Depth of Cover to work within this pipe profile envelope. This is explained in detail in the GEOPAK Drainage Help Files. An Elevation Option of either at Hydraulic Center or at Actual Link End must be selected. Calculations, such as slopes and lengths are based on this selection.

Link Design Options: One of four options must be selected, although this may be changed later in the design process. These are explained in detail in the GEOPAK Drainage Help Files. Link Slope Decimal allows for the selection of the number of decimal places reported for most link slopes.

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CHAPTER 2 Project Preferences. Profile Options

Link Criteria File: This is an option for placing the Drainage Links on the Road cross-sections. TxDOT does not supply any Drainage criteria files.

Hydraulic Gradeline Options: One of two options must be selected, either Equal Hydraulic Gradeline, or Equal Energy Gradeline. These are explained in detail in the GEOPAK Drainage Help Files.

2.4.5. Profile Options

This Option establishes the default profile variables that will be used throughout the project. The set up of the Profile Options can be project specific or the set up can be a standard set by a District or office.

Default Profile ID Prefix: For the profile naming convention, a prefix can be given to automatically and repeatedly name the profiles. The profiles will be numerically sequenced by one. An example is lateral-1, followed by lateral-2, followed by lateral-3, etc. If no prefix is given, the profile name will be 1, followed by 2, followed by 3, etc. The Default Profile ID Prefix can be changed at any time. Profile names can also be given when profiles are created.

Create Cogo Chains and Profiles: If selected, chains and profiles will be stored in the Road coordinate geometry database, the GPK shown in the Project Components. These Cogo chains and profiles will be based on the nodes and links and the naming convention is based on the link name. A top and bottom profile will be created. This is explained in detail in the GEOPAK Drainage Help Files. If this option is desired, it is recommended at the end of the design process.

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CHAPTER 2 Project Preferences. Profile Options

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CHAPTER 2 Project Preferences. Profile Options

2.4.5.1 Plan Symbology

This Option establishes the element symbology that will be used for the plan graphics throughout the project. The set up of the Plan Symbology can be project specific or the set up can be a standard set by a District or office. To set the plan symbology, double click on each Linear graphic and each Text graphic. This opens the Set Feature dialog box. If Label is toggled on, that Component name will be placed. If Set Node Cell Symbology is not toggled on, the cell library symbology will be used for the Node graphics.

Linear Text

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CHAPTER 2 Project Preferences. Profile Options

2.4.5.2 Updates

This Option allows the User to determine whether various data is automatically updated during the design process. As many as desired by the User can be activated by toggle. If not toggled on, then no automatic updating will occur. These can be changed during the design process.

Normally, these will be toggled on, but the User does need to be aware of what the Automatic Updates are doing.

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CHAPTER 2 Project PreferencesSave Options Updates

2.4.6 Save Options

This Option allows for the automatic saving of the project. Automatically Save Drainage Updates: If toggled on, every time an Apply command is issued, then the Drainage Project, the .gdf, is saved. This is recommended.

Automatic Backup: If toggled on, a backup file (_gdf .bak) is created of the Drainage Project when the project is reopened. This is recommended.

Automatic Save: If toggled on the Project is automatically saved based on a set time interval.

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CHAPTER 2 Project PreferencesDrainage Preference File Updates

2.4.7 Drainage Preference File

A feature not available in the previous version of GEOPAK Drainage, used by TxDOT, is the ability to save the Project Preferences into a Drainage Preference File (.dpf). This allows for the later recall of the Preference format into any Drainage Project. A District or office may choose tohave a standard format of Project Preferences for all their projects. In the upper left of the Preferences dialog box under File, a User can Open, Save, or Save As a Drainage Preference File.

The Drainage Preference File does not have to be attached each time a Drainage Project is opened, because the Preferences are held from the previous session. The Drainage Preference File can be attached at any time to set the Preferences to the set format.

When a User is ready to close the Preferences dialog box, select the OK in the lower left corner of the Preferences dialog box. The User will be prompted to save the Preferences settings.

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CHAPTER 2 Project PreferencesSave Drainage Project Updates

The Project Preferences can also be exported to an ASCII format file, a *_Prefs.drp.

From the Microstation pull-down: Drainage > Project > Export > Preferences to ASCIIFrom the Drainage Menu Bar: Project > Export > Preferences to ASCII

From the Drainage Project Tool Palette

2.4.7.1 Save Drainage Project

A good practice to follow before exiting Drainage is to save the Project.

From the Microstation pull-down: Drainage > Project > Save

From the Drainage Menu Bar: Project > Save

From the Drainage Project Tool Palette

2.4.7.2 Exit Drainage Project

From the Microstation pull-down: Drainage > Project > Exit

From the Drainage Menu Bar: Project > Exit

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3 DRAINAGE DESIGN

3.1 Nodes and areas

Introduction The workflow of designing a storm drain system in GEOPAK Drainage will follow a conventional design process. The Designer can place the inlet first and then the corresponding area or vice versa. The Designer could place numerous inlets first or numerous areas first, the workflow is up to the User. In this chapter we will place two inlets and calculate corresponding areas as a class. Then you will place several inlets and areas in an exercise. There is a one to one relationship between the Area and the Node. This means the Area ID or name MUST match the Node ID or name. An example: Drainage Area A1 MUST match Node A1.

Introduction to NodesA Node is a set point with a user defined location, such as an inlet, manhole, or outfall. The Nodes provide the connectivity for the drainage system. The Nodes are located within the Drainage Library and corresponding Cell Library. The Drainage Nodes Tool Palette is shown below.

From the Microstation pull-down: Drainage > Component > Node

From the Drainage Menu Bar: Component > Node

From the Main Drainage Tool Palette

Drainage Nodes Tool Palette

3.2 Introduction to Drainage Areas

A Drainage Area can be used to attach a computed discharge value to a corresponding Node, or to just compute a discharge value. The Drainage Area boundary can be drawn with Microstation, can be created from a digital terrain model, or can simply be a keyed in value. The graphical drainage area boundary must be a closed Microstation Shape.

From the Microstation pull-down: Drainage > Component > Area

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CHAPTER 3 Drainage DesignDelineation of Subareas

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From the Drainage Menu Bar: Component > Area

From the Main Drainage Tool Palette

Drainage Areas Tool Palette

3.3 Delineation of Subareas

The delineation of subareas is an option and is not required, but it allows a designer to break a drainage area into smaller subareas and have different roughness coefficients with these components. If the designer has a land use file, the subareas can be automatically delineated, or the designer can simply key in the values. The land use file is a Microstation design file with Microstation shapes made with the correct symbology to match the Land Use items in the Drainage Library.

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CHAPTER 3 Drainage DesignExercise

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EXERCISE 3.1 DELINEATION OF SUBAREAS

(exercise continued next page)

Step 1 Open Microstation design file, C:\Engdata\v8i_drainageclass\v8i_class\v8iclass.dgn.

Step 2 Access GEOPAK and GEOPAK Drainage, if not already done.

Step 3 Open Drainage Project, v8iclass.gdf, if not already done.

Step 4 Notice Reference File, land_use.dgn, is already attached, but not displayed. It does not need to be Displayed.

Step 5 Under Project Preferences > Node Options, set the Default Node ID Prefix to sub-.

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CHAPTER 3 Drainage DesignExercise

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EXERCISE 3.1 (CONTINUED)

(exercise continued next page)

Step 6 Select Add Drainage Area or Drainage > Component > Area > Add

Notice that the Area ID came from the Default Node ID Prefix and since it is the first Area it has the number 1.

The Drainage Area Definition dialog box is typical of the look or configuration of numerous GEOPAK Drainage dialog boxes. Across the top of the dialog box are different ways to navigate to other Drainage Areas and to different Drainage Area functions. If Window Center is toggled on, the selected Area will be presented in the middle of the computer screen. If Highlight is toggled on, the selected Area will be highlighted with the Microstation highlight color set by the user. Apply will store any current information into the project (.gdf). On the left side of the dialog box will be the Details and Options that the user will have to navigate through to set up a Drainage Area.

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CHAPTER 3 Drainage DesignExercise

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EXERCISE 3.1 (CONTINUED)

(exercise continued next page)

Step 7 Under Definition, a Drainage Area in acres is needed. Under Area Selection / Creation identify Select Shape and select the gray Microstation shape that goes from station 60+00 to station 62+00. Accept the shape selected. The acreage is 1.101 and the symbology will change to match the symbology set in the Project Preferences. The label sub-1 will be placed, also matching the symbology set in the Project Preferences.

Step 8 Key in a Base C Value of 0.35 and a Time of Conc. of 10.00 minutes.

Notice, that at this point, the user has all that is needed to calculate a discharge value or Q under Computation, if Subareas are not being used.

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CHAPTER 3 Drainage DesignExercise

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EXERCISE 3.1 (CONTINUED)

(exercise continued next page)

Step 9 Under Options, select Subareas. This is where the Subareas can be delineated automatically or the Subarea acres, C Value, and Description keyed in.

Step 10 Select Automatic Delineation. Notice, from the referenced land_use.dgn, subareas of Grass, Pavement, and Buildings were identified and the acres and coefficients given.

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CHAPTER 3 Drainage DesignExercise

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EXERCISE 3.1 (CONTINUED)

(exercise continued next page)

Step 11 Under Options, select Computation. The Total Subareas is equal to the combined acres of Grass, Pavement, and Buildings. The Remainder acres did not have an assigned land use value. The Composite equals the acres for Drainage Area under Definition. The Total Subareas C Value is a summation of the acreage percentage times C Value of Grass, Pavement, and Buildings. The Remainder C Value is the Base C Value under Definition. The Composite is the Total Subareas and Remainder combined.

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CHAPTER 3 Drainage DesignExercise

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EXERCISE 3.1 (CONTINUED)

Step 12 Select Compute Discharge. Using the Rational Method, the parameters given in the Project Preferences and Drainage Library and what was defined and calculated from the drainage area, a Computed Discharge is calculated.

Step 13 Select Apply to store or save the Drainage Area in the gdf.

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CHAPTER 3 Drainage DesignExercise

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EXERCISE 3.2 DELINEATION OF SUBAREAS HANDOUT

Step 1 Using Microstation design file, C:\Engdata\v8i_drainageclass\v8i_class\v8iclass.dgn, Select Add Drainage Area or Drainage > Component > Area > Add. This will be sub-2.

Notice the dialog box holds the numbers from the previous use.

Step 2 Using Select Shape, select the top gray Microstation shape that goes from station 62+00 to station 64+00. Use a Base C Value of 0.35 and a Time of Conc. of 10.00 minutes.

Step 3 Go to Subareas and Select Automatic Delineation.

Step 4 Go to Computation and Select Compute Discharge.

Step 5 Select Apply and store area.

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CHAPTER 3 Drainage DesignExercise

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EXERCISE 3.3 ON-GRADE CURB INLET AND DRAINAGE AREA

(exercise continued next page)

Step 1 Open Microstation design file, C:\Engdata\v8i_drainageclass\v8i_class\v8iclass.dgn. We will be storing an on-grade curb inlet and performing the drainage area calculations using the drainage area shape in the upper right location.

Step 2 Access GEOPAK and GEOPAK Drainage, if not already done.

Step 3 Open Drainage Project, v8iclass.gdf, if not already done.

Step 4 Under Project Preferences > Node Options, set the Default Node ID Prefix to inlet-.

Step 5 Close Project Preferences and accept changes.

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CHAPTER 3 Drainage DesignExercise

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EXERCISE 3.3 (CONTINUED)

(exercise continued next page)

Step 6 Select Add Drainage Node or Drainage > Component > Node > Add.

Notice that the Node ID came from the Default Node ID Prefix and since it is the first Node it has the number 1. Next, the user will have to navigate through the Options under Details.

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CHAPTER 3 Drainage DesignExercise

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EXERCISE 3.3 (CONTINUED)

(exercise continued next page)

Step 7 Under Properties, for Node Type select Curb, for Profile select On Grade, for Library Item select TYCCI10. The Library Item is from the Drainage Library. The other features under Properties will be demonstrated in class.

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CHAPTER 3 Drainage DesignExercise

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EXERCISE 3.3 (CONTINUED)

(exercise continued next page)

Step 8 Under Location, the designer will set the Node’s location. This can be done several different ways, depending on what the designer has available. All of the various ways will be demonstrated in class. For this exercise, GEOPAK Road COGO information will be used. Place the Node as shown in the dialog box below. The user may have to place the Node first with the DP button, the yellow cross, so that the program will recognize the Chain for the Station.

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EXERCISE 3.3 (CONTINUED)

(exercise continued next page)

Step 9 Under Spread Criteria, the designer will set the parameters that the program will use to calculate inlet capacity, ponding and by-pass flow, if any. This can be done several different ways, depending on what the designer has available, or simply by key-in of the information. All of the various ways will be demonstrated in class and for this exercise; different inlets will be set up differently. Set up the Spread Criteria as shown below. For the key-in of data, the user will enter the information at the bottom and then add to the larger area above. The Spread Source will be working from the inlet out. Some of the information will be read automatically, depending on what was chosen. An example of this is the Reference PGL, which is the COGO Profile that was selected under Location.

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CHAPTER 3 Drainage DesignExercise

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EXERCISE 3.3 (CONTINUED)

(exercise continued next page)

Step 10 Under Elevations, the designer has different choices based on what information is available and what Options were previously chosen. All of the various ways will be demonstrated in class. Vertical Alignment gives the user six ways for setting the Links to the Nodes and The Minimum Depth and Maximum Depth is for the development of a pipe envelope, which will be explained in class and demonstrated in a later chapter. Set up the Elevations Options as shown below.

Step 11 Under Junction Loss, select Defined Equations. This means that whatever was set in the Project Preferences will be used. If the designer wants to not have any junction losses calculated for the individual inlet, None can be toggled on.

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CHAPTER 3 Drainage DesignExercise

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EXERCISE 3.3 (CONTINUED)

(exercise continued next page)

Step 12 Under Discharge Options, select Use Computed Discharge. The other features under Discharge Options will be demonstrated in class.

.

Step 13 Under Computations, an error will show, because a discharge value has not been applied to the inlet. That will be done in the following steps. We will come back and view the Computations again. Select Apply.

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CHAPTER 3 Drainage DesignExercise

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EXERCISE 3.3 (CONTINUED)

(exercise continued next page)

Step 14 Select Add Drainage Area from one of the several ways demonstrated. You will be prompted to create Drainage Area Inlet-1 to correspond with Node Inlet-1.

Step 15 Using Select Shape, identify the drainage area shape that goes with Node Inlet-1. This will give the acreage for the Drainage Area. This is the shape right of the alignment, from approximate station 54+50 to 56+50. Next, Key in a Base C Value of 0.35 and a Time of Conc. of 10 minutes.

Step 16 Under Subareas, select Automatic Delineation.

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EXERCISE 3.3 (CONTINUED)

Step 17 Under Computation, select Compute Discharge. Select Apply to store Drainage Area Inlet-1.

Step 18 Navigate back to the Node Configuration dialog box for Node Inlet-1 and check the Computations.

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CHAPTER 3 Drainage DesignExercise

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EXERCISE 3.4 SAG CURB INLET AND DRAINAGE AREA

(exercise continued next page)

Step 1 Select Add Drainage Node from one of the several ways demonstrated. You will be prompted to create Node Inlet-2. Select OK.

Step 2 Under Properties, for Node Type, select Curb, for Profile, select Sag, for Library Item, select TYCCI10. Notice the change in the dialog box from the on-grade curb inlet.

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CHAPTER 3 Drainage DesignExercise

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EXERCISE 3.4 (CONTINUED)

(exercise continued next page)

Step 3 Under Location; the dialog box will hold the information from the previous Node, so the user will only have to change what is needed for this Node. The station location is the vertical low point that can be found in COGO. The angle rotation, of 180, is due to the location point of this particular cell. The negative offset is following conventional engineering standard of being on the left side of the alignment.

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CHAPTER 3 Drainage DesignExercise

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EXERCISE 3.4 (CONTINUED)

(exercise continued next page)

Step 4 Under Spread Criteria; for a Sag Inlet there will be discharge coming from two directions. Enter the values as shown below for % Slope Left and Right and % Discharge Left and Right. The slopes come from COGO and the percentages of discharge are the designer’s judgment. For this inlet, the Spread Source will be changed to Shape to use the GEOPAK Road Shape file. Notice that there are two entries, the 24 Width comes from the Shape file and the 1.5 Width comes from the Inlet Options, under Preferences, Extend Superelevation Shapes to Inlet at Shape Slope.

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CHAPTER 3 Drainage DesignExercise

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EXERCISE 3.4 (CONTINUED)

(exercise continued next page)

Step 5 Under Elevations; we will leave the dialog box as previously and notice how the elevation is read automatically.

Step 6 Under Junction Loss, select Defined Equations.

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CHAPTER 3 Drainage DesignExercise

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EXERCISE 3.4 (CONTINUED)

(exercise continued next page)

Step 7 Under Discharge Options, select Use Computed Discharge.

Step 8 Under Computations, an error will show, because a discharge value has not been applied to the inlet. That will be done in the following steps. We will come back and view the Computations again.

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CHAPTER 3 Drainage DesignExercise

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EXERCISE 3.4 (CONTINUED)

(exercise continued next page)

Step 9 Select Add Drainage Area from one of the several ways demonstrated. You will be prompted to create Drainage Area Inlet-2 to correspond with Node Inlet-2.

Step 10 Using Select Shape, identify the drainage area shape that goes with Node Inlet-2. This will give the acreage for the Drainage Area. This is the shape left of the alignment, from approximate station 48+50 to 51+50. Next, Key in a Base C Value of 0.35 and a Time of Conc. of 10 minutes.

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CHAPTER 3 Drainage DesignExercise

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EXERCISE 3.4 (CONTINUED)

(exercise continued next page)

Step 11 Under Subareas, select Automatic Delineation.

Step 12 Under Computation, select Compute Discharge. Select Apply to store Drainage Area Inlet-2.

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CHAPTER 3 Drainage DesignExercise

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EXERCISE 3.4 (CONTINUED)

Step 13 Navigate back to the Node Configuration dialog box for Node Inlet-2 and check the Computations.

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CHAPTER 3 Drainage DesignExercise

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EXERCISE 3.5 NODES AND AREAS HANDOUTUsing the same design file, v8iclass.dgn, the user is to store five Nodes and five Areas. There will be four on-grade inlets and one sag inlet. The user is to follow the two previous Class Exercises to complete this exercise. The inlets will not be in sequence according to stationing. The inlet type, chain, profile, offset, etc. will be the same on all the inlets. Remember that the dialog box will hold the information from the previous operation. This can be to the user advantage; the right side of a roadway may be the same as the left side, with limited changes. Remember that the Node may need to be rotated depending on which side of the alignment it is placed.

Step 1 Store an on-grade inlet, inlet-3, on the left side of the alignment at station 54+50.00. The drainage area will be the shape from station 54+50 to 56+70.

Step 2 Store two on-grade inlets, one on the left, inlet-4, and one on the right, inlet-5, at station 51+50.00. The drainage area will be the shape from station 51+50 to 54+50, one left of the alignment and one right of the alignment.

Step 3 Store a sag inlet, inlet-6, on the right side of the alignment at station 49+93.35. The drainage area will be the shape from station 49+50 to 51+50. The Time of Concentration will be 15 minutes.

Step 4 Store an on-grade inlet, inlet-7, on the right side of the alignment at station 49+45.00. The drainage area will be the shape from station 48+50 to 49+50. The Time of Concentration will be 15 minutes.

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CHAPTER 3 Drainage DesignExercise

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EXERCISE 3.6 OUTLET

(exercise continued next page)

Step 1 Under Project Preferences > Node Options, set the Default Node ID Prefix to out-. This is not required, but is to show the user that the Default Node ID Prefix can be change at any time.

Step 2 Close Project Preferences and accept changes.

Step 3 Select Add Drainage Node or Drainage > Component > Node > Add.

Step 4 Under Properties, for Node Type, select Outlet, for Library Item, select OUTSET24, and toggle on Fix Tailwater at and select Critical Depth. Notice the change in the dialog box from the Curb Node Type.

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CHAPTER 3 Drainage DesignExercise

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EXERCISE 3.6 (CONTINUED)

(exercise continued next page)

Step 5 Under Location, toggle on Chain and select BASE1, toggle on Profile and select PROF1, set Align to Tangent to Chain, set Angle to 90, for Station, key in 49+93.35, toggle on Offset and key in -125.00.

Step 6 Notice, Spread Criteria is grayed out. This is not needed for an Outlet.

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CHAPTER 3 Drainage DesignExercise

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EXERCISE 3.6 (CONTINUED)

(exercise continued next page)

Step7 Under Elevations, set Reference Surface to TIN File and select C:\Engdata\ v8i_drainageclass\v8i_class\design.tin, for Elevation Source, select Reference TIN, for Node Elevation Option, select Same as Source, for Vertical Alignment, select Match Soffit, for Minimum Depth key in 0.00, for Maximum Depth key in 10.00.

Step 8 Under Junction Loss, select Defined Equations.

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EXERCISE 3.6 (CONTINUED)

Step 9 Under Discharge Options, select Use Computed Discharge

Step 10 Computations is grayed out; the computations will be calculated when the Network is designed.

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4 CONVEYANCE SYSTEM

4.1 Introduction to Links

Links convey runoff from various connected Nodes. A Link connects two Nodes and may be pipes, boxes, or ditches. The Drainage Library contains the standard configurations for pipes and boxes.

From the Microstation pull-down: Drainage > Component > Link

From the Drainage Menu Bar: Component > Link

From the Main Drainage Tool Palette

Drainage Links Tool Palette

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CHAPTER 4 Conveyance SystemExercise

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EXERCISE 4.1 DRAINAGE LINKWe will be storing a Link connecting Node inlet-1, station 54+50 to Node inlet-5, station 51+50.

(exercise continued next page)

Step 1 Open Microstation design file, C:\Engdata\v8i_drainageclass\v8i_class\v8iclass.dgn, if not already done.

Step 2 Access GEOPAK and GEOPAK Drainage, if not already done.

Step 3 Open Drainage Project, v8iclass.gdf, if not already done.

Step 4 Under Project Preferences > Link Options, set the Default Link ID Prefix to ss-, if not already done.

Step 5 Close Project Preferences and accept changes.

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CHAPTER 4 Conveyance SystemExercise

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EXERCISE 4.1 (CONTINUED)

(exercise continued next page)

Step 6 Select Add Drainage Link or Drainage > Component > Link > Add.

Notice that the Link ID came from the Default Link ID Prefix and since it is the first Link it has the number 1.

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CHAPTER 4 Conveyance SystemExercise

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EXERCISE 4.1 (CONTINUED)

(exercise continued next page)

Step 7 Under Definition, the location of the Link will be determined by the From Node and To Node. These can be determined by the corresponding pull down, the ID button, or with the use of a Microstation element. These features will be demonstrated in class. Select or ID inlet-1 for the From Node and select or ID inlet-5 for the To Node. Select Circular for Shape and Concrete for Material. Toggle on Design Size. No size will be selected and the program will determine the Link size needed. Select Apply to store the Link and to see the Length.

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CHAPTER 4 Conveyance SystemExercise

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EXERCISE 4.1 (CONTINUED)

(exercise continued next page)

Step 8 Under Conditions, an allotted pipe “envelope” is created. The elevations are based on the Node elevations minus the Minimum Depth and Maximum Depth entered in the Node Configuration dialog box under Elevations. The Minimum Depth is the minimum the Soffit will be set and the Maximum Depth is maximum the Invert will be set. GEOPAK Drainage will Design the Link profiles based on this envelope. The user has the option to change these elevations and slopes at a later time, if desired.

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CHAPTER 4 Conveyance SystemExercise

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EXERCISE 4.1 (CONTINUED)

Step 9 Under Constraints are the Minimum and Maximum values that will be used as Design Constraints. GEOPAK Drainage will stay within the Minimum and Maximum Rise and Slope and will try to stay within the Design Constraints for the Velocity. If the program can not, a warning will be displayed. For this exercise, key in 1.5 for the Minimum Rise and 5.0 for the Maximum Rise, key in 0.4 for the Minimum Slope and 10.0 for the Maximum Slope and key in 1.0 for the Minimum Velocity and 10.0 for the Maximum Velocity.

Step 10 Under Computation, a notice will be given that the computations will be performed when a Network is created and designed. This will be in the following chapter. Select the Apply to store the Link.

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CHAPTER 4 Conveyance SystemExercise

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EXERCISE 4.2 LINKS HANDOUTUsing the same design file, v8iclass.dgn, the user is to store six additional Links. The user is to follow the previous Class Exercise to complete this exercise. The Design Constraints will be the same as the previous Class Exercise.

Step 1 Store a Link, ss-2, from inlet-3, at station 54+50.00 on the left side of the alignment to inlet-4, at station 51+50.00 on the left side of the alignment.

Step 2 Store a Link, ss-3, from inlet-5, at station 51+50.00 on the right side of the alignment to inlet-6, at station 49+93.35 on the right side of the alignment.

Step 3 Store a Link, ss-4, from inlet-4, at station 51+50.00 on the left side of the alignment to inlet-2, at station 49+93.35 on the left side of the alignment.

Step 4 Store a Link, ss-5, from inlet-7, at station 49+45.00 on the right side of the alignment to inlet-6, at station 49+93.35 on the right side of the alignment.

Step 5 Store a Link, ss-6, from inlet-6, at station 49+93.35 on the right side of the alignment to inlet-2, at station 49+93.35 on the left side of the alignment.

Step 6 Store a Link, ss-7, from inlet-2, at station 49+93.35 on the left side of the alignment to out-1.

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5 NETWORK

5.1 System Creation

Introduction to Network

In GEOPAK Drainage, a Network is a system of interconnected Nodes and Links to a single Outlet. A Network can only have one Outlet, but a Project can have multiple Networks. The Network computations are the final calculation process in the Design or Analysis of a storm drain system. A Network has to be successfully built in order to complete the computations. Inlets and Drainage Areas can be computed independently of a Network, but Links are dependent on a Network for computations.

From the Microstation pull-down: Drainage > Network

From the Drainage Menu Bar: Network

From the Main Drainage Tool Palette

Drainage Network Tool Palette

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CHAPTER 5 NetworkExercise

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EXERCISE 5.1 NETWORK (SYSTEM CREATION)

(exercise continued next page)

Step 1 Open Microstation design file, C:\Engdata\v8i_drainageclass\v8i_class\v8iclass.dgn, if not already done.

Step 2 Access GEOPAK and GEOPAK Drainage, if not already done.

Step 3 Open Drainage Project, v8iclass.gdf, if not already done.

Step 4 Select Add Drainage Network or Network > Add

Step 5 Key in Network ID, this is the name of the Network. Notice that the program has identified the Outlet Node. If more than one Outlet Node was available, the user would select or ID the desired Outlet Node.

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CHAPTER 5 NetworkExercise

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EXERCISE 5.1 (CONTINUED)

(exercise continued next page)

Step 6 Under Validation, select Build Network. This is the “hammer”. GEOPAK Drainage will use the selected Outlet Node and work upstream to include all connected Drainage Areas, Nodes, and Links. It will only include what is connected. An Information box will appear saying if the creation was successful or not. The number of Nodes and Links in the Network will also be given. Once a Network is built, the user will not have to Build Network again, unless Nodes and Links are added or removed.

Step 7 Under Validation, select Highlight Network, this is the dialog next to the “hammer”. All of the components of the built Network; the Drainage Areas, Nodes, and Links, will highlight with the highlight color of Microstation. The Outlet Node will not highlight. This is an opportunity for the user to verify the Network.

Step 8 Select Apply to store the Network.

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CHAPTER 5 NetworkExercise

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EXERCISE 5.1 (CONTINUED)

Step 9 Under Computations, select Design Network. This is the “pencil”. Computations will be explained at the end of this chapter. An information box will appear with one of three messages; either Hydraulics Successfully Computed, Hydraulics Computed With Warnings, or Error in Network. Hydraulics Computed With Warnings is informing the user that at least one of the Design Constraints or Parameters was not met or exceeded. These are not necessarily problems, but warnings to be looked at by the designer.

Step 10 Select OK. View Warnings in drdmsg.txt. This text file is created and re-created with each Network Design or Analyze.

Step 11 Determine if Warnings need to be addressed or ignored.

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CHAPTER 5 NetworkIntroduction to Computations

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5.2 Introduction to Computations

Under Computations are two options, Network Design or Analyze. Each performs a different function concerning the hydraulic calculations. With Design, GEOPAK Drainage uses the Preferences, Parameters and Constraints set by the designer and the program designs the system. This means the program sets the pipe size, flow lines, slopes, etc. based on what the designer gives. With Analyze, GEOPAK Drainage does an analysis on the system set up by the designer. This means the program has to have the pipe sizes, flow lines, slopes, etc. set by the designer. A normal workflow may be that the designer allows GEOPAK Drainage do the Design and after that the designer can make the adjustments desired and then do an Analyze to check the adjustments. If a user inputs an existing system, an Analyze would be performed.

5.3 Introduction to Active Network

Since a Project can have multiple Networks, the user can set an Active Network and the program will look at that Network specifically.

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6 DRAINAGE PROFILES

6.1 Introduction to Drainage Profiles

Drainage Profiles, in GEOPAK Drainage, allow the user to define a path between two Nodes, spanning one or more Links, in a Network. Along this path, which GEOPAK Drainage automatically traverses, the user can visualize the existing ground, proposed ground, pipes, cross structures, and other information.

From the Microstation pull-down: Drainage > Component > Profile

From the Drainage Menu Bar: Component > Profile

From the Main Drainage Tool Palette

Drainage Profile Tool Palette

6.2 Profile Preference File

A time saving feature available is the ability to save the Profile Preferences into a Profile Preference File, a .ppf. This allows for the later recall of the Preference format into any Drainage Profile. A District or office may choose to have a standard format of Profile Preferences for all their profiles. In the upper left of the Profile dialog box under File, a User can Open, Save, or Save As a Profile Preference File.

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CHAPTER 6 Drainage ProfilesExercise

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EXERCISE 6.1 DRAINAGE PROFILE

(exercise continued next page)

Step 1 Open Microstation design file, C:\Engdata\v8i_drainageclass\v8i_class\v8iclass.dgn, if not already done.

Step 2 Access GEOPAK and GEOPAK Drainage, if not already done.

Step 3 Open Drainage Project, v8iclass.gdf, if not already done.

Step 4 Select Add Drainage Profile or Component > Profile > Add

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CHAPTER 6 Drainage ProfilesExercise

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EXERCISE 6.1 (CONTINUED)

(exercise continued next page)

Step 5 Key in a Profile ID, the profile name. Select or ID the From Node and To Node. Select or ID inlet-3 for the From Node and select or ID inlet-2 for the To Node.

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CHAPTER 6 Drainage ProfilesExercise

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Exercise 6.1 (continued)

(exercise continued next page)

Step 6 To complete the Profile, the user will have to work through the five folders; Registration, Display, Drainage Information, Grid & Labels, and Link Profiles, or attach an existing Profile Preference File. Under the Registration folder is the information concerning the location, scale, and size of the profile. The Registration Point is the starting point for the profile. GEOPAK Drainage will start the Profile at this point and go left to right and work up. This will be the lower left point of the Profile. For a set of plans, the Registration Point may be the lower left corner of a grid sheet. For this exercise, select the DP, and data with the left button of the mouse where the Profile is to begin. For Scale, key in a 10.0 for the Horizontal and key in a 5.0 for the Vertical. The user can verify or change the beginning and ending Nodes under Node Information. Projection allows the user to project the profile along a roadway alignment and stationing, this will be demonstrated in a later exercise. The Grid Stationing is the length of the Profile in stations. These can not be changed and the Begin Station is 0+00, unless it is projected to a roadway alignment. The Max Elevation and Min Elevation are for the profile grid. This can be adjusted, if desired. The Reference Surface allows the user to select a TIN file, GEOPAK Site Model or GEOPAK Site Object to project a ground surface onto the profile. The Reference Surface may not be necessary if Original Ground and/or Design Surface TIN files were selected under Project Preferences > Project Components.

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CHAPTER 6 Drainage ProfilesExercise

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Exercise 6.1 (continued)

(exercise continued next page)

Step 7 The next three folders; Display, Drainage Information, and Grid & Labels, allows the user the options necessary to customize a Drainage Profile in appearance. Under the Display folder is the information concerning the Link, Surface, and Crossings. The option has to be toggled on and the Set Feature symbology set. Not all of these options may be on all projects.

To set the symbology, double click in the box next to the toggle. This opens the Set Feature dialog box.

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CHAPTER 6 Drainage ProfilesExercise

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Exercise 6.1 (continued)

(exercise continued next page)

Step 8 Under the Drainage Information folder are the options concerning hydraulic information, minimum and maximum information, and whether to show the Drainage Nodes. The options desired have to be toggled on and the Set Feature symbology set. The Apply can be selected at any time to see the results. Options can be changed and the Apply selected and the changes will be reflected.

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CHAPTER 6 Drainage ProfilesExercise

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Exercise 6.1 (continued)

(exercise continued next page)

Step 9 Under the Grid & Labels folder are the options for text and grids for the Drainage Profile. On the left of the folder under Labels & Grid Lines, the desired option must be turned on, by a “double click” of the left mouse, to “un-ghost” the options on the right of the folder. As previously, the options desired can be toggled on and set. With the labels are also different options, such as Offset, Prefix, Suffix, stacking, and others. Remember, the Apply can be selected at any time to see the results. Options can be changed and the Apply selected and the changes will be reflected.

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CHAPTER 6 Drainage ProfilesExercise

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Exercise 6.1 (continued)

(exercise continued next page)

Step 10 Under the Link Profile folder are the Profile Points and Details of the Links, Nodes, and Elevations that will be used on this Drainage Profile. This can be changed or adjusted at this point, if desired. Select Apply to store and visualize the profile.

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CHAPTER 6 Drainage ProfilesExercise

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Exercise 6.1 (continued)

Step 11 After the user is satisfied with the appearance of the profile, a Drainage Profile Preference File can be created by going to the upper left under File and select Saved. This .ppf can be used on future profiles, if desired.

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CHAPTER 6 Drainage Profiles Profile Preference File

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EXERCISE 6.2 DRAINAGE PROFILE HANDOUT Using the same design file, v8iclass.dgn, the user is to store an additional Drainage Profile. The user is to follow the previous Class Exercise to complete this exercise. Store a Profile from inlet-1 toout-1. Remember to attach the .ppf, if desired and to set a new Registration Point.

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CHAPTER 6 Drainage Profiles Introduction to Drainage Automated Profile Builder

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6.3 Introduction to Drainage Automated Profile Builder

The Drainage Automated Profile Builder gives the user the flexibility to create multiple profiles at one time in whatever combination the user desires. The program will stack the profiles vertically. The user can also allow the program to automatically populate the dialog field by selecting Query. Query is the top button on the right panel. The program will select the longest run of Links and then add additional profiles to complete the whole Network. The user will have to select a Preference File. This is the .ppf. It is required. The user must key in the horizontal and vertical scale. The user must select an Origin with the DP button and key in a Vertical Stack Offset. This is the distance between the profiles. Apply will draw all the profiles in the dialog field.

From the Microstation pull-down: Drainage > Component > Profile > Auto Create

From the Drainage Menu Bar: Component > Profile > Auto Create

from the Drainage Profile Tool Palette

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CHAPTER 6 Drainage ProfilesExercise

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EXERCISE 6.3 AUTOMATIC CREATE PROFILE

(exercise continued next page)

Step 1 Open Microstation design file, C:\Engdata\v8i_drainageclass\v8i_class\v8iclass.dgn, if not already done.

Step 2 Access GEOPAK and GEOPAK Drainage, if not already done.

Step 3 Open Drainage Project, v8iclass.gdf, if not already done.

Step 4 Select Automatic Create Profile or Component > Profile > Auto Create

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CHAPTER 6 Drainage ProfilesExercise

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Exercise 6.3 (continued)

(exercise continued next page)

Step 5 Add profile Name ss1, From Node inlet-1 and To Node inlet-5, to list. In the three middle spaces, the user will key in a profile Name and then select the From Node and select the To Node. The user will then select the Add List Item toggle, the “yellow starburst” on the right panel. This will add the profile to the large area. Add profile Name ss2, From Node inlet-3 and To Node inlet-4, to list. The user can make changes to the list with the function buttons on the right. Select a Preference File. Enter a horizontal and vertical scale. Select an Origin with the DP button and key in a Vertical Stack Offset of 100.

Step 6 Select Apply. This will draw all the profiles in the dialog field.

Step 7 Verify profiles created. The Drainage Automated Profile Builder may build a grid with non-conventional vertical elevations. An example may be a minimum elevation of 892 instead of 890. This gives the grid non-conventional numbers, such as 892, 897, 902, etc. If this is the case the profile can be edited and the desired minimum elevation keyed in at the Registration folder, under Min. Elevation.

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CHAPTER 6 Drainage ProfilesExercise

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Exercise 6.3 (continued)

Step 8 Keep the Drainage Automated Profile Builder open and the remaining profiles will be added in an Individual Exercise Handout.

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CHAPTER 6 Drainage ProfilesExercise

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EXERCISE 6.4 AUTOMATIC CREATE PROFILE HANDOUT Using the Drainage Automated Profile Builder, the user is to add the remaining profiles. Use the remaining Nodes and Links. Select Apply and verify created profiles. Adjust elevations, if desired.

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CHAPTER 6 Drainage ProfilesExercise

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EXERCISE 6.5 DRAINAGE PROFILE – PROJECT TO CHAINIn this exercise a Drainage Profile will be created along a Roadway Chain or alignment. GEOPAK Drainage will use the Green Cell created with the Road profile to project the Drainage Profile. The Road profile Green Cell must be present.

(exercise continued next page)

Step 1 Open Microstation design file, C:\Engdata\v8i_drainageclass\v8i_class\v8iclass.dgn, if not already done

Step 2 Access GEOPAK and GEOPAK Drainage, if not already done.

Step 3 Open Drainage Project, v8iclass.gdf, if not already done.

Step 4 Open GEOPAK Road Design & Computation Manager.

Step 5 Navigate to FEATURES > PROFILES > PROFILES 10 H 10 V SCALE > PGL/Offset Design and select D_PROF_1.

Step 6 Select Draw Plan & Profile.

Step 7 Change Label Scale to 10. Highlight or select Prof1, the proposed road profile. This will bring up another dialog box.

Step 8 Under Plot Settings, set Horizontal Scale to 10 and Vertical Scale to 5. Key in 45+00 for the Begin Station. Key in 60+00 for the End Station. Key in 100 for the Strip Grade Increment. Set Reference Station to 45+00 and Reference Elevation to 880.00. DP the starting X and Y. Select Base1 for the PGL Chain. Select Draw Cell at XY; this is required. Select OK to draw the Road profile. Close all GEOPAK Road Design & Computation Manager dialog boxes.

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CHAPTER 6 Drainage ProfilesExercise

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Exercise 6.5 (continued)

Step 9 Select Add Drainage Profile or Component > Profile > Add

Step 10 Enter a Profile ID, select or ID inlet-3 for the From Node and inlet-2 for the To Node.

Step 11 Attach the .ppf. Under the Registration folder, toggle the Project to Chain under Projection. Notice parts of the Registration folder will “ghost out”. Select Identify Profile Cell and highlight and accept the Road Green Cell.

Step 12 Under Grid & Labels, toggle off any Grid options, if desired. This is because the program will create a grid for the entire Road Green Cell boundary area.

Step 13 Select Apply.

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7 SYSTEM MODIFICATION AND ANALYSIS

7.1 Introduction to System Modifications and Analysis

Since GEOPAK Drainage is a true interactive design tool, various modifications can be performed with ease. Several class exercises will be demonstrated to illustrate this. Also, several other features will be demonstrated in class.

7.2 Examples of System Modifications

GEOPAK Drainage’s interconnectivity can be seen in the modification of a Node’s location. When the Node is moved, the length of the Link is adjusted, as well as the elevations.

To change the pipe size, go to the Link Configuration Definition and Select the desired size next to Design Size. Remember to toggle Apply. After the Link size has been changed, you will need to do a Network Analyze and not a Network Design.

GEOPAK Drainage allows an ease in adjusting Link slopes as well as Invert and Soffit elevations. Under Link Configuration Conditions, Profile Conditions, three columns are available for adjustments: From Node, Slope, and To Node. Two of these three columns are needed to make adjustments. In an elevation column, only the Soffit or Invert need to be changed. An example could be to toggle on From Node Invert elevation and to change the elevation and toggle on Slope and adjust the slope. GEOPAK Drainage will adjust the To Node elevation when an Analyze is done on the Network. Another location where the Links can be adjusted, in general terms, is the Minimum and Maximum Depths under Node Configuration – Elevations.

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CHAPTER 7 System Modification and AnalysisExamples of System Modifications

During the design process, Nodes are often placed at various places along the alignment, causing the Node numbering to be non-sequential. GEOPAK Drainage has two tools that allow for the renaming or renumbering of Drainage Nodes. The Renumber Nodes tool allows the user to Renumber and/or Rename selected Nodes. The Rename Drainage Node tool is a separate tool used for one Node at a time.

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CHAPTER 7 System Modification and AnalysisExamples of System Modifications

Although not a modification, a common need for a TxDOT designer is to add off-site drainage to a project. GEOPAK Drainage allows for this under Node Configuration – Discharge Options. The user can toggle on and select either Link Base Flow Area or Link Base Flow Discharge. With Link Base Flow Area, a drainage area is selected and with Link Base Flow Discharge, a Q value is keyed in.

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CHAPTER 7 System Modification and AnalysisExercise

EXERCISE 7.1 LINK AND DRAINAGE PROFILE ADJUSTMENT

(exercise continued next page)

Step 1 Open Microstation design file, C:\Engdata\v8i_drainageclass\v8i_class\v8iclass.dgn, if not already done.

Step 2 Access GEOPAK and GEOPAK Drainage, if not already done.

Step 3 Open Drainage Project, v8iclass.gdf, if not already done.

Step 4 View Profile ss-7, or profile representing Link 7. Note the length of the profile and link.

Step 5 View the Preferences – Updates and confirm that all options are toggled on. Close the Preferences dialog box.

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CHAPTER 7 System Modification and AnalysisExercise

Exercise 7.1 (continued)

Step 6 Select Id Edit Drainage Node and highlight out-1 or open Node Configuration dialog box and navigate to out-1. Go to Node Configuration – Location and change Offset from -125 to -100. Select Apply.

Step 7 Open Edit Drainage Network and select Design Network. Select Apply.

Step 8 View Profile ss-7, or profile representing Link 7. Note the length of the profile and link.

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CHAPTER 7 System Modification and AnalysisExercise

EXERCISE 7.2 ANALYZE A 100 YEAR STORM ON NETWORK

(exercise continued next page)

Step 1 Open Microstation design file, C:\Engdata\v8i_drainageclass\v8i_class\v8iclass.dgn, if not already done.

Step 2 Access GEOPAK and GEOPAK Drainage, if not already done.

Step 3 Open Drainage Project, v8iclass.gdf, if not already done.

Step 4 View the Preferences – Updates and remove the toggle from Automatic Update Profiles on Network Design.

Step 5 View the Preferences – Frequency Options and under Rational Frequency Options, Computation Frequency, set to 100 Year. Select OK and store changes to Preferences.

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CHAPTER 7 System Modification and AnalysisExercise

Exercise 7.2 (continued)

Step 6 Select Network > Analyze. GEOPAK Drainage will analyze the 100 year storm on the 10 year storm design. Since this is an analysis, GEOPAK Drainage does not change the system. In the drgmsg.txt, you may see warnings that were not seen previously with the 10 year design. An example of this may be Exceeded Bypass Flow Unassigned.

Step 7 Visualize or pan to the location, in the design file, of the profile for ss-7 or Link 7, the Link from Inlet-2 to the Outfall.

Step 8 Create a new Drainage Profile, ss7-100, From Node Inlet-2 and To Node outfall orOut-1. The reason for this new profile is to compare the 100 Year HGL to the 10 Year HGL.

Step 9 The Registration Point, or starting point, for the 100 Year profile needs to match the Registration Point for the 10 Year profile. Under Registration, select DP and snap to the Registration Point or the lower left corner of the grid. Another option for obtaining the same Registration Point would be to open and then close the dialog box for the 10 Year profile before creating the 100 Year profile. Check and adjust, if necessary, the Max. Elevation and Min. Elevation.

Step 10 Under the Display tab, uncheck any toggled display features to prevent duplicate elements, if desired.

Step 11 Under the Drainage Information tab, change the Hydraulic Grade Line symbology to a different color.

Step 12 Under the Grid & Labels tab, uncheck any toggled features to prevent duplicate elements, if desired.

Step 13 Select Apply.

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CHAPTER 7 System Modification and AnalysisExercise

EXERCISE 7.3 COMPUTE TC

(exercise continued next page)

Step 1 Open Microstation design file, C:\Engdata\v8i_drainageclass\v8i_class\v8iclass.dgn, if not already done.

Step 2 Access GEOPAK and GEOPAK Drainage, if not already done.

Step 3 Open Drainage Project, v8iclass.gdf, if not already done.

Step 4 Open Drainage Area inlet-7. This is the larger area at the lower right of the system. In this exercise, GEOPAK Drainage will be used to compute a “real time” Time of Concentration. Under Preferences – Intensity Option, a Minimum Time of Concentration has been set to 10 minutes. This is used in the area calculation as the minimum.

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CHAPTER 7 System Modification and AnalysisExercise

Exercise 7.3 (continued)

(exercise continued next page)

Step 5 Under Drainage Area Definition, select Compute TC. Notice how the dialog box totally changes. It can be expanded by the > in the lower right corner.

Step 6 In the upper left, toggle Model to TIN File, and select design.tin.

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CHAPTER 7 System Modification and AnalysisExercise

Exercise 7.3 (continued)

(exercise continued next page)

Step 7 Define Path allows for three different methods to determine the flow path along which the time of concentration will be calculated. Trace will perform a downstream trace, along the selected TIN file, from the beginning data point to the lowest point along the path. ID allows for the selection of a Microstation element as the graphical representation of the flow path. ID-Segments allows the user to issue data points along the selected TIN file to determine the Sheet Flow, Shallow Flow, and/or Concentrated Flow. For this exercise, select Trace and place a data point, with the left button of the mouse, at a location of the designer’s choosing, to determine the flow path for the time of concentration.

This example will be explained on the following page. No two flow paths will be exactly the same, due to the fact that no two beginning points for the trace will be exactly the same.

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CHAPTER 7 System Modification and AnalysisExercise

Exercise 7.3 (continued)

(exercise continued next page)

Step 8 After the flow path has been determined, the designer must make decisions concerning the type of flow. The designer is in control of how this tool calculates the time of concentration. This tool may place information that the designer wants to adjust. An example could be that the tool places information in Concentrated Flow and the designer wants Shallow Flow. The designer can change or adjust this. The flow path can be any combination of Sheet Flow, Shallow Flow or Concentrated Flow. Toggle on the desired flows, for this exercise, toggle on Sheet Flow and Concentrated Flow. If a flow is toggled on, the information for it must be complete. An example being, for Sheet Flow, there must be a Length, n Value and Slope.

Step 9 On the right side of the expanded dialog box is Details. The Distance, Slope, and Avg. Slope come from the TIN file and the flow path location. Adjust Flow and Max Flow Distances can be used to adjust the flows. For this exercise, enter 300 for Max Sheet Flow Distance.

Step 10 For this exercise, enter 0.35 for the n Value of Sheet Flow. The GEOPAK Drainage Help files, under Technical Reference, have examples of n values.

Step 11 For this exercise, under Concentrated Flow, adjust Method to Kirpich. Enter 0.1 for Height above outlet, or use the Height/Slope tool in the DTM Tools to determine this value.

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CHAPTER 7 System Modification and AnalysisExercise

Exercise 7.3 (continued)

Step 12 Select Compute to calculate the TC. Select Apply. Notice how the dialog box changes back to Drainage Area and places the computed Tc value under Time of Conc.

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8 DRAINAGE NAVIGATOR

8.1 Navigator, Global Editor, and Querying

Introduction

The Drainage Navigator is actually three tools in one. It is a Navigator tool, a Global Editor tool and a Query tool. The Drainage Navigator is an optional tool that some users use frequently, while some choose to never use. It depends on the user’s preference.

From the Microstation pull-down: Drainage > Utilities > Navigator

From the Drainage Menu Bar: Utilities > Navigator

From the Main Drainage Tool Palette

8.2 Introduction to Navigator

The Navigator is another way to maneuver through the Components of a Drainage Project. It provides another access to Area, Inlet, Node, Link, Profile, Culvert, and Routing. It allows for All Networks or just the Active Network. A user can Add, Modify, Delete, or Rename Components from the Navigator. Users can also Highlight and/or Window Center specific Components. This allows for ease in locating Components. It can be very useful in the viewing of what Components

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CHAPTER 8 Drainage NavigatorIntroduction to Global Editor

are stored in the Project and for finding specific Components on a large Project or Network, especially if the user is not familiar with the Drainage Project.

8.3 Introduction to Global Editor

The Global Editor allows the user to edit parameters of components on the Project. It allows an easy way to batch edit numerous components at one time.

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CHAPTER 8 Drainage NavigatorExercise

EXERCISE 8.1 BATCH EDITING WITH GLOBAL EDITOR

(exercise continued next page)

Step 1 Open Microstation design file, C:\Engdata\v8i_drainageclass\v8i_class\v8iclass.dgn, if not already done.

Step 2 Access GEOPAK and GEOPAK Drainage, if not already done.

Step 3 Open Drainage Project, v8iclass.gdf, if not already done.

Step 4 Open Drainage Navigator. In upper left corner of dialog box, under View, change to Global Editor.

Step 5 Select Link.

Step 6 Highlight Link ss-1 or the first Link in the list. Next, hold down the Shift key, and highlight Link ss-7 or the last Link in the list. This will highlight all the Links in the list.

Step 7 Select or highlight Link-Maximum Rise. Change New Value from 5.00 to 4.00.

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CHAPTER 8 Drainage NavigatorExercise

Exercise 8.1 (continued)

Step 8 Toggle Apply Edit No Confirm. This value has been changed on every Link on the Project.

Step 9 To view change, open any Link and view Link Configuration Constraints and look at Maximum.

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CHAPTER 8 Drainage NavigatorIntroduction to Query

8.4 Introduction to Query

The Query Tool, within the Navigator, allows the user to specify a subset of the current Components on the Project based on a query of Values or Constraints. The Query Tool is only enabled for Areas, Inlets, and Links. To activate the Query Tool, toggle Query in the Navigator and the dialog box will expand to include Query Options. The Query Options available are Query Type,

Condition, Variable, and Value. The Query Type can be Values or Constraints.

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CHAPTER 8 Drainage NavigatorExercise

EXERCISE 8.2 QUERYING

(exercise continued next page)

Step 1 Open Microstation design file, C:\Engdata\v8i_drainageclass\v8i_class\v8iclass.dgn, if not already done.

Step 2 Access GEOPAK and GEOPAK Drainage, if not already done.

Step 3 Open Drainage Project, v8iclass.gdf, if not already done.

Step 4 Toggle or select Area for the Component.

Step 5 Set Query Type to Values. Set Condition to >. Set Variable to Time of Conc. Key in 10.00 for the Value

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CHAPTER 8 Drainage NavigatorExercise

Exercise 8.2 (continued)

Step 6 Toggle or select Apply Query.

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CHAPTER 8 Drainage NavigatorExercise

EXERCISE 8.3 QUERYINGUsing the same design file, v8iclass.dgn and by following the previous Class Exercise, complete this exercise on Querying.

Step 1 Determine how many Links are greater than a hundred feet.

Step 2 Determine how many Links are 18”.

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9 DRAINAGE REPORTS

9.1 Introduction

GEOPAK Drainage provides five standard Drainage Reports, plus the ability to create custom reports. The standard reports are updated automatically and can be viewed at any time in the design process. Only one frequency at a time can be outputted to a Report.

From the Microstation pull-down: Drainage > Reports

From the Drainage Menu Bar: Reports

From the Main Drainage Tool Palette

Drainage Reports Tool Palette

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CHAPTER 9 Drainage ReportsStandard Drainage Reports

9.2 Standard Drainage Reports

The standard Drainage Reports provided are Drainage Areas, On Grade Inlets, Sag Inlets, Link Configuration, and Link Hydraulic Computations. These Reports can be outputted in an ASCII format and read by various editors, such as Notepad, WordPad, or Excel. The Reports for Drainage Areas, On Grade Inlets, and Sag Inlets allow for the viewing of All Networks in the Drainage

Project or just the Active Network, while the Reports for Link Configuration, and Link Hydraulic Computations require an Active Network. Each time a Network is updated, the Reports are also updated.

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CHAPTER 9 Drainage ReportsDrainage Report Builder

9.3 Drainage Report Builder

The Report Builder provides the user with the ability to create custom reports. The format of the custom reports can be saved and used on subsequent projects or by other users. This allows a District or office to have the same format for all their Drainage Reports. The Report Builder allows for the flexibility to combine Component Data, such as both drainage area information and inlet information in the same report. The custom report created by Report Builder will consist of row and column data that can be imported into Excel.

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CHAPTER 9 Drainage ReportsExercise

EXERCISE 9.1 DRAINAGE REPORT BUILDERIn this exercise a custom report will be created with Report Builder and the format saved as an example for future projects.

(exercise continued next page)

Step 1 Open Microstation design file, C:\Engdata\v8i_drainageclass\v8i_class\v8iclass.dgn, if not already done.

Step 2 Access GEOPAK and GEOPAK Drainage, if not already done.

Step 3 Open Drainage Project, v8iclass.gdf, if not already done.

Step 4 Open Report Builder, Reports > Builder or Drainage > Reports > Builder.

Step 5 Set Component Report Basis to Area and set Component Data to Area.

Step 6 Under Available Data, highlight Area-ID and toggle Include. Also Include Area-TC Used, Area-Discharge, and Area-Intensity.

Step 7 Change Component Data to Inlet. Include Inlet-Description, Inlet-Capacity, Inlet-Computed Ponded Width, and Inlet-Computed Ponded Depth.

Step 8 Change Component Data to Node. Include Node-Reference Chain, Node-Reference PGL, Node-Station, Node-Offset, and Node-Elevation.

Step 9 Enter a Default Output File Name.

Step 10 Enter csv under the Default Output File Extension and set Decimal Places to 2.

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CHAPTER 9 Drainage ReportsExercise

Exercise 9.1 (continued)

(exercise continued next page)

Step 11 Toggle on Include Field Names and set Delimiter to Comma.

Step 12 Toggle Generate.

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CHAPTER 9 Drainage ReportsExercise

Exercise 9.1(continued)

Step 13 Open the Excel application and review the generated csv file. Close Excel.

Step 14 In the upper left corner of the Report Builder dialog box, under Report File, select Save and enter a file name. The saved drf file can be used on future projects or by other designers within the organization.

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10 DRAINAGE PLAN VIEW LABELER

10.1 Introduction

The GEOPAK Drainage Labeler allows the designer to create and place plan view labels on the drawing file. The Drainage Labeler is an interactive tool which makes repetitive placement of labels simple and fast. Once a label is created, the format can be saved for future use on other projects or by other designers. The Labeler can be used on Drainage Areas, Inlets, Nodes, and Links. It allows for computed information from the project and for user defined information. The Labeler allows the use of the keyboard to supplement input information. If a user is familiar with GEOPAK Road Labelers, such as the Plan Labeler, Profile Labeler, or Cross Section Labeler, the Drainage Labeler works similarly.

From the Microstation pull-down: Drainage > Utilities > Labeler

From the Drainage Menu Bar: Utilities > Labeler

From the Utilities Tool Palette

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CHAPTER 10 Drainage Plan View LabelerExercise

EXERCISE 10.1 DRAINAGE LABELER

In this exercise labels will be created and placed on the Drainage Areas and the format saved as an example for future projects.

(exercise continued next page)

Step 1 Open Microstation design file, C:\Engdata\v8i_drainageclass\v8i_class\v8iclass.dgn, if not already done.

Step 2 Access GEOPAK and GEOPAK Drainage, if not already done.

Step 3 Open Drainage Project, v8iclass.gdf, if not already done.

Step 4 Open Drainage Labeler, Utilities > Labeler or Drainage > Utilities > Labeler.

Step 5 With the Labeler set to Area, under the Text envelope tab, highlight or select inlet-1, under Element ID. Notice a selection circle placed in the drawing file at Drainage Area inlet-1. The symbology will match the Microstation symbology.

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CHAPTER 10 Drainage Plan View LabelerExercise

Exercise 10.1 (continued)

(exercise continued next page)

Step 6 With Computed Inserts toggled on, under Computed Text, highlight and double-click Area-ID. This will place the Area-ID, inlet-1, in the open space in the upper right corner of the dialog box.

Step 7 Toggle the Return button or use the Enter key on the keyboard. Toggle on User Inserts and select, under User Text, Tc= and double-click.

Step 8 Change User Inserts back to Computed Inserts. Select Area-Tc Used and double-click. Select the Space button or use the space key on the keyboard.

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CHAPTER 10 Drainage Plan View LabelerExercise

Exercise 10.1 (continued)

(exercise continued next page)

Step 9 Change Computed Inserts to User Inserts and select Min and double-click.

Step 10 Using the combination of Computed Inserts and User Inserts, place Area-Discharge and Area-Intensity in the open space.

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CHAPTER 10 Drainage Plan View LabelerExercise

Exercise 10.1 (continued)

(exercise continued next page)

Step 11 Select the Params. envelope tab and set the Text Preferences / Symbology and Line Spacing. This can be set by opening the Sample Dialog or by using one of the Set buttons to the right of the Sample Dialog.

Step 12 Select the Shape envelope tab and select a Shape Preference, if desired. If a Shape was selected, set the Symbology and Offset.

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CHAPTER 10 Drainage Plan View LabelerExercise

Exercise 10.1 (continued)

(exercise continued next page)

Step 13 If a Leader is desired, a Leader Type, Terminator, and the Symbology, can be set under the Leader envelope tab. For this Class Exercise, a Leader will not be used.

Step 14 If the rotation of the label needs to be changed or adjusted, it can be done under the Rotate envelope tab.

Step 15 Select the Place Label button, on the right side of the dialog box, and place the label in the desired location.

Step 16 Navigate back to the Text envelope tab and highlight the next Element ID. Notice the text in the open space changes to match the selected Element ID and the selection circle moves to the selected Drainage Area. Select the Place Label button and place the new label.

Step 17 Place the remaining Drainage Area labels from the Element ID.

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CHAPTER 10 Drainage Plan View LabelerExercise

Exercise 10.1 (continued)

(exercise continued next page)

Step 18 To save this Drainage Area Label Style for future use, navigate to the Styles envelope tab and highlight Default Labels. This will “unghost” New Style and allow for the creation of a new style.

Step 19 Under Create Style, enter a Style Name and select OK.

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CHAPTER 10 Drainage Plan View LabelerExercise

Exercise 10.1 (continued)

Step 20 Notice how a new style has been created under Default Labels. This can be recalled for later use.

Step 21 In the upper left of the Labeler dialog box, under Style Files, this change to the label style file can be Save, or if a new label style file, .lsf, can be created by using the Save As. This is a way for an office or District to set up their drainage plan view labels to always look the same.

Step 22 Open the Drainage Preferences and select Plan Symbology under Options. Untoggle the Label for Areas and select OK.

Step 23 To remove the Plan Symbology Labels from the drawing, Area Update All needs to be performed. This command is located in several locations, one location is Drainage > Component > Area > Update All.

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CHAPTER 10 Drainage Plan View LabelerExercise

EXERCISE 10.2 DRAINAGE LABELER HANDOUT

Using the same design file, v8iclass.dgn, the user is to create and place Labels for the Nodes. The user is to follow the previous Class Exercise to complete this exercise. The user can set up the Labels to have any appearance they desire.

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CHAPTER 10 Drainage Plan View LabelerLabel Updater

10.2 Label Updater

If revisions or changes happen on a system or project after labels have been placed, the labels can be updated with the Label Updater, located under Tools on the Drainage Labeler. It is an easy way to update information or data on the original label without having to replace or create new labels. The Label Updater will find and update the appropriate labels.

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11 AUTOMATED QUANTITIES

11.1 Introduction

GEOPAK Drainage, using the Compute functionality of GEOPAK Road’s Design & Computation Manager, can summarize the Drainage quantities of a Project or Network in several different formats and at any time in the design process. The user must have a Drainage Library that is set up with Pay Items for the Nodes and Links that match the D&C Manager’s database, the .ddb. A class exercise will demonstrate the process necessary. This function updates the Link symbology to the symbology that is set in the D&C Manager, which is a dual line.

From the Microstation pull-down:Applications > GEOPAK > Road > Design & Computation Manager

From the Road Tool Palette

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CHAPTER 11 Automated QuantitiesExercise

EXERCISE 11.1 AUTOMATED QUANTITIES

In this exercise GEOPAK Drainage and GEOPAK Road’s D&C Manager will be used to summarize the quantities on the class project.

(exercise continued next page)

Step 1 Open Microstation design file, C:\Engdata\v8i_drainageclass\v8i_class\v8iclass.dgn, if not already done.

Step 2 Access GEOPAK and GEOPAK Drainage, if not already done.

Step 3 Open Drainage Project, v8iclass.gdf, if not already done.

Step 4 Open the Drainage Library, TxDOT_V8i.dlb, Drainage > Project > Drainage Library or Project > Drainage Library.

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CHAPTER 11 Automated QuantitiesExercise

Exercise 11.1 (continued)

(exercise continued next page)

Step 5 Navigate to the Nodes folder, set the Node Types to Curb, and find the curb inlet TYCCI10. On the right side of the dialog box, use Modify Library Item to open and review the Node Item. Notice that this Node Item has a Pay Item set. This Pay Item must be set for the Compute function in D&C Manager to work. In the TxDOT_V8i.dlb all Node Items and most typically used Link Items have the Pay Item set. Close Node Item dialog box and Drainage Library after review.

Step 6 Review the Project Components under the Drainage Preferences. Review the Drainage Library File, Drainage Cell Library, and DDB, for this class, TxDOT_V8i.dlb, TxDOT_V8iDrain.cel, and TxDOT_V8iDrain.ddb.

Step 7 For the Pay Item to be recognized the Update with Pay Items must be performed on both the Nodes and Links. These operations are located at several locations, such as, Drainage > Component > Node > Update with Pay Item and Drainage > Component > Link > Update with Pay Item. Notice the changes in the pipe symbology in the drawing.

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CHAPTER 11 Automated QuantitiesExercise

Exercise 11.1 (continued)

(exercise continued next page)

Step 8 Open the GEOPAK Road Design & Computation Manager. In the upper left of the main dialog box, under File > Open, attach TxDOT_V8iDrain.ddb.

Step 9 Select the Compute function from the operations icons on the main dialog box. Add the desired PAYITEMS into the collection area at the bottom of the main dialog box. This is done by highlighting the item and then with the right mouse button, Add to Collection, for this exercise, Safety End Treatment, Inlets & Manholes, and RCP Circular.

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CHAPTER 11 Automated QuantitiesExercise

Exercise 11.1 (continued)

(exercise continued next page)

Step 10 GEOPAK provides numerous formats in which to view the quantities and save the information. The format desired determines how the Plan Quantity dialog box is set up. The Extents and Baseline Reference influences what information can be shown on the different formats. For this exercise set up the dialog box as shown below.

Step 11 Select Compute Quantities and review the located quantities in the Computation Results dialog box. Set the Export Format to Comp Book, type in a text file name, and select Export.

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CHAPTER 11 Automated QuantitiesExercise

Exercise 11.1 (continued)

Step 12 Open the created text file with an editor, such as the GEOPAK Road Text Editor.

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12 NODE CREATION

12.1 Introduction

GEOPAK Drainage allows the user the flexibility of creating Nodes. These can be project specific Nodes or Nodes that are the standard for an office or District, but are not currently in the Drainage Library. Once these Nodes are created and placed in the Drainage Library, they can be used on future projects and by other users. A cell has to be used with the Node item; it can be a new creation or an existing cell. A Node item cell has to be created in a particular way for the program to recognize its functions. This will be demonstrated in the following class exercise. For more information on Node Cells, go to the GEOPAK Drainage Help Files.

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CHAPTER 12 Node CreationExercise

EXERCISE 12.1 NODE CREATION

In this exercise the user will create a new cell representing a curb inlet. The user will then create a new Node Item in the Drainage Library and use the newly created cell with the new Node Item.

(exercise continued next page)

Step 1 Open Microstation design file, C:\Engdata\v8i_drainageclass\v8i_class\v8iclass.dgn, if not already done.

Step 2 Access GEOPAK and GEOPAK Drainage, if not already done.

Step 3 Open Drainage Project, v8iclass.gdf, if not already done.

Step 4 Open the Drainage Help Files, Application > GEOPAK > DRAINAGE > Help.

Step 5 Navigate to Bentley Civil Help > Drainage > Command Reference > Project > Drainage Library > Node Items > Node Cells. This is an explanation of how the Node Cells are to be created. Not all of these points have to be created and any that are not created, the program will default that point to the cell origin.

Step 6 Set Level to D_MISC_1, set Color to 2, set Style to 0, and set Weight to 1. Using Microstation, draw or create, a 10’ X 4’ rectangle.

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CHAPTER 12 Node CreationExercise

Exercise 12.1 (continued)

(exercise continued next page)

Step 7 Since the Construction Class Element is not normally used in a TxDOT environment, it has to be set. In the Microstation Attributes Tool Box, toggle on Active Element Class. This is done by using the right mouse while touching the Microstation Attributes Tool Box. Change Primary to Construction. Also, in the Microstation View Attributes Tool Box, confirm that Constructions is toggled on.

.

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CHAPTER 12 Node CreationExercise

Exercise 12.1 (continued)

(exercise continued next page)

Step 8 Next, the user will set the Microstation symbology for the Pipe Connection Points, remembering to follow the guidelines in the Drainage Help Files. Set Level to D_MISC_2, set Color to 3, set Style to 6, set Weight to 6, and set Active Element Class to Construction. The Weight was set to 6 for visibility, but the Style must be set to 6.

Step 9 Using Microstation Place Active Point, the Midpoint Snap, and the symbology shown above, place a Pipe Connection Point on all four sides of the previously created rectangle.

Step 10 Place a Hydraulic Center Point, using the correct Style of 7, in the center of the rectangle. The graphics are complete, so set the Active Element Class back to Primary.

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CHAPTER 12 Node CreationExercise

Exercise 12.1 (continued)

(exercise continued next page)

Step 11 Next, the user will create a Microstation Cell of the graphics. From the Microstation Primary Tool Box, open the Cell Library dialog box. Confirm that the cell library TxDOT_V8iDrain.cel is attached.

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CHAPTER 12 Node CreationExercise

Exercise 12.1 (continued)

(exercise continued next page)

Step 12 Place a Fence around the rectangle. Place a Cell Origin on the Hydraulic Center Point. Select Create, in the lower right corner, which is unghosted, since a Fence is placed and a Cell Origin is placed. Enter a Name and Description. Select Create. A new cell has been placed in the Cell Library.

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CHAPTER 12 Node CreationExercise

Exercise 12.1 (continued)

Step 13 Open the Drainage Library and the Nodes folder and set Node Types to Curb. On the right side of the dialog box, select Add Library Item. Complete the information and parameters for the new Curb Inlet. Remember to select the newly created cell for the Plan View Cell. The Pay Item will be left at None, since a Pay Item was not added to the database. An example of the Node Item is shown below.

Step 14 Select OK, and a new Node Item of the new curb inlet and cell has been added to the Drainage Library. Save the Drainage Library.

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13 DTM TOOLS

13.1 Introduction

GEOPAK Drainage, using the Digital Terrain Modeling functionality of GEOPAK Road, gives the user numerous tools to assist in the design process. The DTM Tools use the TIN file, or triangulation file. The TIN file can come from several different sources and is common on most TxDOT projects. If a TIN file is needed, one suitable for some of the drainage functions can be obtained, and this will be demonstrated later in this chapter. The user may already be familiar with these tools and their use. Some of the tools are taught in the GEOPAK I class. The tools are presented here as a refresher and to remind the user of their functions. Not all of the tools will be demonstrated here or in the class room setting. The Help Files give a good description of each tool.

From the Microstation pull-down: Applications > GEOPAK > Road > DTM Tools

From the Road Tool Palette

DTM Menu Bar (Shown Below)

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CHAPTER 13 DTM ToolsAnalysis Tools

13.2 Analysis Tools

From the DTM Tool Bar

Height/Slope Tool

From the Analysis Tool Bar

Height/Slope

From the DTM Menu Bar pull-down: Analysis > Height/Slope

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CHAPTER 13 DTM ToolsAnalysis Tools

The Height/Slope Tool is a multi-purpose tool for obtaining information from the TIN file. The information can simply be viewed when Display Only is toggled, or placed in the design file when Display Only is not toggled on. With the Mode set to Elevation, as the cursor is moved over the TIN file, the plan coordinates, elevation, and slope are given and if toggled on, the Contour, Triangle, and Flow Arrow can be displayed. The symbology for these Options can be set to the User’s preference. With the Mode set to Slope, the User can obtain a Triangle Slope, if toggled on, by simply moving the cursor across the TIN file after selecting Start. To obtain a Slope for a desired length, toggle Slope between points, select Start and the starting point with the cursor and drag the cursor to the second location. Additional information, Distance and Delta Elevation, can be obtained with this selection. The Text symbology can be set to the User’s preference as well as the Display unit, such as percent or run/rise. Take time to become familiar with this versatile tool, the Height/Slope Tool.

Profile ToolFrom the Analysis Tool Bar

Profile

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CHAPTER 13 DTM ToolsAnalysis Tools

From the DTM Menu Bar pull-down: Analysis > Profile

The Profile Tool is a valuable tool that allows a user to obtain a profile of any size and location along a TIN file, by draping an element on the TIN file or files. Across the top left of the dialog box are three icons, Object Selection, Create Profile, and Profile Preferences. Object Selection allows the user to select the desired TIN file and symbology for the profile. Create Legend is available, if desired. On the right side of the dialog box are additional options. Create Profile allows the user to define the profile’s location or alignment and preview the extracted surface profile. The profile can also be placed as a cell. Profile Preferences allow the user to set up grids, scales, text, and ranges, as desired.

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CHAPTER 13 DTM ToolsExercise

EXERCISE 13.1 PROFILE TOOL

(exercise continued next page)

Step 1 Open Microstation design file, C:\Engdata\v8i_drainageclass\v8i_class\v8iclass.dgn, if not already done.

Step 2 Access GEOPAK and GEOPAK Drainage, if not already done.

Step 3 Open Drainage Project, v8iclass.gdf, if not already done.

Step 4 Open the Profile Tool.

Step 5 Under Object Selection, using the magnifying glass at the center bottom, select TIN File, design.tin. Right of the magnifying glass, set the symbology and toggle on the Extract. On the right side of the dialog box, select Add List Item.

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CHAPTER 13 DTM ToolsExercise

Exercise 13.1 (continued)

(exercise continued next page)

Step 6 Using the magnifying glass again, select TIN File, topo.tin. Right of the magnifying glass, set a different symbology and toggle on the Extract. On the right side of the dialog box, select Add List Item.

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CHAPTER 13 DTM ToolsExercise

Exercise 13.1 (continued)

(exercise continued next page)

Step 7 Next, navigate to Create Profile. The user has two ways to identify the profile location, Select Profile Element or Place Profile Element. To use Select Profile Element, a Microstation element must be present in the design file. To use Place Profile Element, the user will drape a line across the design file using the cursor. In the design file, window in to the area around station 55+00. Select Place Profile Element and using the cursor, place a line perpendicular to station 55+00 for approximately 200 feet, 100 feet on each side of the centerline. Notice, a profile for each TIN file has been placed in the open area of the dialog box.

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CHAPTER 13 DTM ToolsExercise

Exercise 13.1 (continued)

Step 8 Next, navigate to Profile Preferences. Make changes to the preferences as desired. This could be adding a Horizontal Grid, Vertical Grid and the Major Text. As a change or adjustment is made, the user can navigate back to the Create Profile icon and view the changes that were made.

Step 9 After the user has the profile complete, it can be placed in the design file, if desired, at the Create Profile icon location.

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CHAPTER 13 DTM Tools Trench Volumes

13.3 Trench Volumes

From the Analysis Tool Bar

Trench Volumes

From the DTM Menu Bar pull-down: Analysis > Trench Volumes

The Trench Volumes tool gives the designer the ability to obtain trench excavation volumes, bedding material volumes, and back fill material volumes. GEOPAK uses the TIN file, Drainage Project, and the Trench Details in the Drainage Library to obtain these volumes. The user will navigate through the Options on the left side of the dialog box and has options, such as side slope conditions, to model the normal workflow. The output can be put into an ASCII format file for review or printing a paper copy, if desired.

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CHAPTER 13 DTM ToolsDrainage Tools

13.4 Drainage Tools

From the Analysis Tool Bar

Drainage Tools

From the DTM Menu Bar pull-down: Analysis > Drainage Tools

The Drainage Tools are not only available in the GEOPAK Road DTM Tools, but the same Drainage Tools are available in GEOPAK Drainage. In GEOPAK Drainage, the DTM Drainage Tools are found under Utilities.

From the Utilities Tool Bar

DTM Drainage Tools

From the Microstation pull-down: Drainage > Utilities > DTM Drainage Tools

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CHAPTER 13 DTM ToolsDrainage Tools

From the Drainage Menu Bar: Utilities > DTM Drainage Tools

Introduction

The DTM Drainage Tools are actually twelve different tools that allow the designer to analyze and evaluate the drainage TIN file. These tools can be very useful in the drainage design process. Some of these tools will be demonstrated here, but for a good description of each tool go to the Help Files, or press the F1 key on a standard keyboard.

There are several common fields typical to most of the tools. The TIN file is the binary triangulation file that the selected tool will analyze or evaluate. This file can be located by using the magnifying glass select button and navigating to the file. Display Only, when toggled on, allows the user to view elements without actually having the elements drawn in the design file. With Display Only toggled on, the elements displayed will be erased when the screen is refreshed or when a new view command is executed. Load Within Fence, when toggled on, allows the user the flexibility of only drawing or displaying the element within a Microstation fence that has been placed by the user. Set Graphic Group, when toggled on, will place all drawn elements in a single graphic group, allowing the user the ability to manipulate all the elements as one. The Apply button when pressed begins the selected process.

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CHAPTER 13 DTM ToolsDrainage Tools

Delineate All WatershedsThe Delineate All Watersheds tool will draw the watershed boundaries, defined by a low point in the TIN file, for the selected TIN file. This tool creates Microstation shapes of the watersheds. This tool may not necessarily create the watersheds at the exact location that the designer needs a drainage area, such as at a specific inlet, but it will give the designer information that can be used to create the specific drainage areas needed for the project.

Minimum Low Point Depth, set in feet, allows the user the ability to set a depth that will be used as the minimum. This allows for the program to pass over small indentations or small dips in the TIN and pass to the next low point. This allows for the removal of what might be considered a false flat. The user may set different depths and see if there are any significant differences. Refine Watershed, when toggled on, processes the TIN file for more precise flow boundaries within the triangles. Watersheds allow the user to set the Microstation symbology that the watershed shapes will be drawn with. If the Microstation fill attribute is active, than the shapes will have different fill colors. Zero Slope Areas, when toggled on, will show, with the selected symbology, an outline of the zero slope triangles. Void Areas, when toggled on, will show, with the selected symbology, an outline of any voids.

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CHAPTER 13 DTM ToolsExercise

EXERCISE 13.2 DELINEATE ALL WATERSHEDS

(exercise continued next page)

Step 1 Open Microstation design file, C:\Engdata\v8i_drainageclass\v8i_class\v8iclass.dgn, if not already done.

Step 2 Access GEOPAK and GEOPAK Drainage, if not already done.

Step 3 Open Drainage Project, v8iclass.gdf, if not already done.

Step 4 Open the DTM Drainage Tools dialog box and for the TIN File, select design.tin.

Step 5 Under Options, select Delineate All Watersheds.

Step 6 Toggle on Set Graphic Group and Refine Watershed and enter a Minimum Low Point Depth of 0.2

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CHAPTER 13 DTM ToolsExercise

Exercise 13.2 (continued)

Step 7 Under Watersheds, set the Microstation symbology to your preference.

Step 8 Select Apply. The user can watch the program process the information at the bottom of screen. After processing the TIN file information, the watersheds will be drawn. If not Active, turn on Fill under View Attributes in Microstation.

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CHAPTER 13 DTM ToolsDelineate Watershed

13.5 Delineate Watershed

The Delineate Watershed tool allows the designer the ability to further delineate watersheds at a particular location within the TIN file. GEOPAK Drainage using the TIN file, Microstation elements selected by the designer, and a Pour Point identified by the designer will create a new watershed. This tool will be demonstrated in class, but the typical work flow for this tool is to work the three buttons at the bottom of the dialog box from left to right. Use Boundary Selection Criteria, if toggled on, will select the elements that match the symbology that has been set to the right. This is an option that may or may not be a benefit. The user will select the desired watershed boundary elements with Pick Boundary Elements. Then the user will select a Pour Point with a data point from the mouse. This must be in a sump or low point location. Last the user will data point inside the selected elements and accept the data location. Both the Delineate All Watersheds and the Delineate Watershed are useful tools for the designer, but in urban storm sewer design with drainage areas needing to match up with inlets, it may still be necessary for the designer to use conventional Microstation or other methods to come up with the correct drainage areas. Some of the other drainage tools, to be shown in the following pages, can also be useful to come up with the drainage areas.

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CHAPTER 13 DTM ToolsDrainage Patterns

13.6 Drainage Patterns

Using a downstream trace from the centroid of each triangle, the Drainage Patterns tool evaluates the flow paths from the TIN file. To use this tool simply select Apply.

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CHAPTER 13 DTM ToolsDownstream Trace

13.7 Downstream Trace

The Downstream Trace tool will delineate a downstream flow path from a point, identified by the user, to a low point in the TIN file, following the steepest descent. Minimum Low Point Depth, set in feet, allows the user the ability to set a depth that will be used as the minimum allowing the program to pass over small indentations or small dips in the TIN and pass to the next low point. To use the Downstream Trace tool, select Apply, then place a data point for the beginning location. Multiple data points can be selected after the Apply has been selected.

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CHAPTER 13 DTM ToolsUpstream Trace

13.8 Upstream Trace

The Upstream Trace tool will delineate an upstream flow path from a point, identified by the user, to a high point in the TIN file, following the steepest descent. To use the Upstream Trace tool, select Apply, then place a data point for the beginning location. Multiple data points can be selected after the Apply has been selected.

13.9 Flow Arrows

The Flow Arrows tool shows the direction of flow within the triangles. The arrow will be placed at the centroid of the triangle and the direction of flow is for that triangle. The number of arrows corresponds with the number of triangle. The size of the arrow is set at Arrow Size.

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CHAPTER 13 DTM ToolsDelineate Low Points

13.10 Delineate Low Points

This tool locates all the low points in the TIN File and places an arrow and text with the letters “LP”. The size of the arrow is set at Arrow Size with Minimum Low Point Depth working similar to how it worked on previous tools. This can be a very useful tool, but remember if one is using a proposed TIN file based on cross-sections, those sections may have been only every one hundred feet, and thus not giving a true low point on the vertical curves of the road. Check in COGO for the true low point on the roadways.

13.11 Delineate High Points

This tool locates all the high points in the TIN file and places an arrow and text with the letters “HP”. The size of the arrow is set at Arrow Size.

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CHAPTER 13 DTM ToolsRidge Lines

13.12 Ridge Lines

The Ridge Lines tool delineates the ridge lines, being defined as a triangle edge where the flow is away from the edge on each side.

13.13 Sump Lines

The Sump Lines tool delineates the sump lines, being defined as a triangle edge where the flow is toward the edge on each side and is found in areas of concentrated flow.

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CHAPTER 13 DTM Tools Surface Ponds

13.14 Surface Ponds

The Surface Ponds tool will delineate any areas of ponded water that are present within the TIN file. If Fill is active in the View Attributes, the ponds will be displayed with the color selected in the Ponds symbology. Islands in the ponds will also be displayed.

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CHAPTER 13 DTM ToolsPond Analysis

13.15 Pond Analysis

The Pond Analysis tool gives the designer the ability to obtain information about any ponds that may be present in the TIN file. The designer can obtain volume, area, surface elevation, and pond depth.

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CHAPTER 13 DTM ToolsExercise

EXERCISE 13.3 POND ANALYSIS

(exercise continued next page)

Step 1 Open Microstation design file, C:\Engdata\v8i_drainageclass\v8i_class\v8iclass.dgn, if not already done.

Step 2 Access GEOPAK and GEOPAK Drainage, if not already done.

Step 3 Open Drainage Project, v8iclass.gdf, if not already done.

Step 4 Open the DTM Drainage Tools dialog box and for the TIN File, select design.tin.

Step 5 Under Options, select Pond Analysis and set the symbology for Ponds and Islands to your preference.

Step 6 Navigate, in the design file, to station 20+00.

Step 7 Select Apply and with the mouse, place a data point about 50 feet right of station 20+00.

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CHAPTER 13 DTM ToolsExercise

Exercise 13.3 (continued)

Step 8 Review information given by Pond Analysis.

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CHAPTER 13 DTM ToolsDEM Maps

13.16 DEM Maps

One of the strengths of GEOPAK Drainage is the use of TIN files, but the typical TxDOT road project TIN file is only from right of way to right of way. This type of typical TIN file may not give the drainage designer enough information, especially for the creation of drainage areas. Designers in some urban districts may have access to information locally, such as a city, county or flood control district, but designers in rural districts may be limited in obtaining TIN file information. Available to designers, at TxDOT, are Digital Elevation Map (DEM) information. The Digital Elevation Map (DEM) is also called National Elevation Dataset (NED). The DEM map is a USGS type map in a three dimensional format. Personnel at TSD have access to these maps and can make the information available to TxDOT designers. If a designer contacts TSD at 512-302-2350, option 3, option 2, and give the location and survey reduction factor for that location, the TSD personnel can assist with the request. The designer can obtain a GEOPAK TIN or if desired an XYZ format ASCII file, that the designer can convert to a GEOPAK dat file and TIN file. The DEM maps have an accuracy of thirty meters, meaning a spot shot was taken every thirty meters in a grid format. The accuracy is equivalent to a USGS. This accuracy is not good enough for final design, but may be accurate enough for drainage areas and preliminary design. This will be demonstrated in class.

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14 CULVERTS

14.1 Introduction

Culvert, within GEOPAK Drainage, is a versatile tool for the design and analysis of culvert structures. The computations use the standard methods in HY8 and FHWA. The methods and formulas used are given in the Technical Reference section of the Help Files. The workflow of the Culvert dialog box is the same as other GEOPAK applications. The user will navigate through five envelopes, Parameters, Configurations, Headwall Location, Overtopping, and Computations. The structures available for use in Culvert are from the Drainage Library under Links. These could be RCP, CMP, arch pipes, ellipse pipes, or box structures. The Computations available are Culvert, Tailwater, and Overtopping. The results can be outputted to an ASCII file to be stored or print a hard copy.

From the Microstation pull-down: Drainage > Component > Culvert

From the Drainage Menu Bar: Component > Culvert

From the Main Drainage Tool Palette

Drainage Culvert Tool Palette

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CHAPTER 14 CulvertsIntroduction

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CHAPTER 14 CulvertsExercise

EXERCISE 9.1 CULVERT-CULV1

(exercise continued next page)

Step 1 Open Microstation design file, C:\Engdata\v8i_drainageclass\v8i_culv1\culv1_mdf.dgn.

Step 2 Access GEOPAK and attach the Road Project, culv1. The job118.gpk is in the folder C:\Engdata\v8i_drainageclass\v8i_culv1.

Step 3 Access GEOPAK Drainage and create a Drainage Project, culv1.gdf.

Step 4 Since a new Drainage Project has been created, the Project Preferences will need to be set or a Drainage Preference File, .dpf, will need to be attached. Since in this exercise only a drainage discharge will be calculated and a culvert designed, the Preferences will reflect that. Only the minimum will be set. Open Drainage > Project > Preferences.

Step 5 Worked down through the Options, for Units use English.

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CHAPTER 14 CulvertsExercise

Exercise 14.1 (continued)

(exercise continued next page)

Step 6 Under Project Components, select the Drainage Library File, TxDOT_V8i.dlb, located at C:\Engapp\TXDOTGPK\Drainage. Select the GPK Job Number, 118. Select the Drainage Cell Library, TxDOT_V8iDrain.cel, also located at C:\Engapp\TXDOTGPK\Drainage. Nothing else has to be set for a culvert.

Step 7 Under Rainfall Parameters, for the Rainfall Source under the Rational Method, select Denton County.

Step 8 Land Use Options will be left as is.

Step 9 After the user has the profile complete, it can be placed in the design file, if desired, at the Create Profile icon location.

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CHAPTER 14 CulvertsExercise

Exercise 14.1 (continued)

(exercise continued next page)

Step 9 Several discharge frequencies will be calculated later, but for the first calculation, set the Computation Frequency to 10 Year for the Rational Frequency Options.

Step 10 Intensity Option will be left as is, but notice that at the top of the dialog box, that it is pointing to the TxDOT_V8i.dlb and that Compute Intensity from Library Rainfall Data Source is toggled on.

Step 11 Junction Losses, Inlet Options, Node Options, Link Options, and Profile Options will all be left as is, the default settings.

Step 12 Under Plan Symbology set the Plan View Parameters to the user’s preference, but only Areas, Culverts and Headwall needs to be set.

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CHAPTER 14 CulvertsExercise

Exercise 14.1 (continued)

(exercise continued next page)

Step 13 Under Updates, leave at the default settings with nothing toggled on.

Step 14 The Save Options can also be left at the default settings, but the user may choose to toggle on Automatic Backup.

Step 15 In the upper left, select Save, and create a Drainage Preference File. Select OK and Yes to store the changes to the Preferences.

Step 16 Culvert will require discharge information and for this exercise GEOPAK Drainage will be used to obtain discharge for a 10 year, 50 year and 100 year, using the Rational Method. Select Add Drainage Area or Drainage > Component > Area > Add and select OK at the default setting of 1. This will open the Drainage Area Definition dialog box with an Area ID of 1.

Step 17 For the Drainage Area, use the Select Shape and identify and accept the dark blue Microstation shape representing the drainage area. This will give a value in acreage. The shape will change symbology based on the symbology set in the Preferences.

Step 18 For a Base C Value, enter 0.35.

Step 19 To obtain a Time of Conc., the Compute TC tool will be used. Select Compute TC. Expand the dialog box by using the > in the lower right corner.

Step 20 Set to TIN File and select culv1.tin.

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CHAPTER 14 CulvertsExercise

Exercise 14.1 (continued)

(exercise continued next page)

Step 21 Toggle on Sheet Flow, leave the Method set at FHA and enter 0.35 for the n Value. In the lower right corner of the dialog box, enter 300 for Max Sheet Flow Distance.

Step 22 Toggle on Shallow Flow and enter 0.35 for the Inter. K. In the lower right corner of the dialog box, enter 3000 for Max Shallow Flow Distance.

Step 23 For Define Path, use Trace, and identify, with a mouse data point, the starting point for the Define Path. The starting point needs to be within the drainage area and for this exercise use the upper left corner of the drainage area.

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CHAPTER 14 CulvertsExercise

Exercise 14.1 (continued)

(exercise continued next page)

Step 24 Select Compute and the program will calculate a time value in minutes and this will be shown in the lower left corner. The value given is based on the starting point and probably will not be the same as the example shown below.

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CHAPTER 14 CulvertsExercise

Exercise 14.1 (continued)

(exercise continued next page)

Step 25 Select Apply. This will take the user back to the Drainage Area Definition dialog box and will place the computed value in Time of Conc. The designer has a Drainage Area value, Base C Value, and Time of Conc. Value under Definition.

Step 26 Since this exercise is not using the Land Use option, the Subareas, under Options, can be skipped. If any information is found at this location, it was held in the dialog box from previous work and needs to be deleted or removed.

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CHAPTER 14 CulvertsExercise

Exercise 14.1 (continued)

(exercise continued next page)

Step 27 Under Computation, select Compute Discharge. From the parameters given, this will calculate a Computed Intensity and a Computed Discharge. This was for a 10 year design. Write the Computed Discharge value down. All users may not have the same numbers, this is due to the variations in the starting location for the Tc path and if a user had other variations. Leave the Drainage Area Computations dialog box open at the Computation location.

Step 28 Open Preferences and navigate to Frequency Options. Set Computation Frequency to 50 Year. Select OK and store changes. Go back to the Drainage Area Computations dialog box and select Compute Discharge. New values will be calculated for a 50 year design. Write the Computed Discharge value down.

Step 29 Open Preferences and navigate to Frequency Options. Set Computation Frequency to 100 Year. Select OK and store changes. Go back to the Drainage Area Computations dialog box and select Compute Discharge. New values will be calculated for a 100 year design. Write the Computed Discharge value down. Select Apply and close the Drainage Area Computations dialog box.

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CHAPTER 14 CulvertsExercise

Exercise 14.1 (continued)

Step 30 Open Add Culvert or Drainage > Component > Culvert > Add. Enter a Culvert Name and select OK. This will open the Culvert dialog box.

Step 31 Discharge values calculated with GEOPAK Drainage can not be brought directly into Culvert. The discharge values must be keyed–in by the user. At the Parameters folder, under Discharge, the only option is User Supplied. A discharge value is keyed-in at the bottom key-in field and then the Add List Item button is selected, the yellow star burst. This adds the discharge value into the larger field. Enter the three discharge values calculated previously in this exercise. The discharge value that the designer wants to use for the Culvert design must be designated with an X. This is done by highlighting the desired value and selecting the Select Discharge button. This is the light bulb symbol or by double clicking the desired value. Culvert will design based on the selected discharge and will do an analysis of the remaining discharge values.

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CHAPTER 14 CulvertsExercise

Exercise 14.1 (continued)

(exercise continued next page)

Step 32 Also located at the Parameters folder is Tailwater. The designer has two options, User Supplied or Compute. For this exercise, Compute will be used. The information needed is for the down stream cross section, so the program can calculate a tailwater elevation. The necessary information is Slope %, N Value, and a downstream cross-section.

Step 33 One way to obtain the downstream Slope % is by using the Height/Slope tool that was discussed in the last chapter. Enter a Slope % value. The value is entered as a positive. It is understood that the flow is downstream. The approximate proposed culvert location is station 40+50.

Step 34 Enter an N Value for the downstream cross section. For this exercise, enter 0.040.

Step 35 Adjust Tailwater Depth will be left at 0.

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CHAPTER 14 CulvertsExercise

Exercise 14.1 (continued)

(exercise continued next page)

Step 36 A downstream cross section is needed to calculate a tailwater elevation. This can either be user supplied by using the key-in fields or the designer can use Extract Cross Section. Extract Cross Section will place the downstream cross section information into the larger key-in field for the designer. Select Extract Cross Section. A second dialog box opens, Define Culvert Tailwater Cross Section. Notice that this tool works similar to the Profile Tool that was discussed in the last chapter.

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CHAPTER 14 CulvertsExercise

Exercise 14.1 (continued)

(exercise continued next page)

Step 37 For the TIN File, select culv1.tin. Select Place Element and drape a line or pull the mouse cursor across the location of the desired downstream cross section. This will “unghost” OK. Select OK.

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CHAPTER 14 CulvertsExercise

Exercise 14.1 (continued)

(exercise continued next page)

Step 38 When the dialog box, Define Culvert Tailwater Cross Section, closes the extracted downstream cross section is placed in the cross section field.

Step 39 Navigate next to the Configuration tab. This is where the designer selects the type of structure to use. The designer can select the size of the structure or have GEOPAK design a structure size. The options for the types and sizes of structures come from the Drainage Library. Select Circular for Shape and Concrete for Material.

Step 40 For the Culvert Size, set to Design Size and enter the parameters that the program will use to design the structure size. The road profiles, shown in the plan view design file, can be used to help determine these parameters. Set Allowable Headwater to 5, set Maximum Rise to 4, and set Minimum rise to 2.

Step 41 Select an Entrance Type. This will set the Entrance Ke value.

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CHAPTER 14 CulvertsExercise

Exercise 14.1 (continued)

(exercise continued next page)

Step 42 Toggle Design Barrels, this allows the program to design the necessary number of barrels for the structure. Set the Roughness to 0.012 for concrete.

Step 43 Navigate next to the Headwall Location tab, leave the Type at Plan View, and select culv1.tin for the TIN File. In the design file zoom in to the proposed culvert location, approximate station 40+50.

Step 44 Notice that the Upstream Headwall is on the left side of the dialog box, while the Downstream Headwall is on the right. For Reference Chain, select RDWY and for the Library Item, select Headwall. If the program does not accept either of these, navigate back one folder and then come back to the Headwall Location folder. An example of this would be another Library Item is selected, but the cell representation does not match what was selected.

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CHAPTER 14 CulvertsExercise

Exercise 14.1 (continued)

(exercise continued next page)

Step 45 Using the Dynamic Place for the Upstream Headwall, place culv1-UP at the approximate location selected by the designer. Notice the program will bring up another dialog box, Headwall Cross Section. Also notice as the mouse cursor is moved, the Chain Stationing, Offset, and Elevation are being read. Perform the same operation for the Downstream Headwall, culv1-DN. If desired, set the Angle to 180 and select Apply. The symbology will match what was set in the Preferences.

Step 46 If the designer wants to set the headwalls to a set station and offset, these can be keyed-in, toggled on and the Keyin Place selected. It is normally a good workflow to use Dynamic Place before Keyin Place. This allows the program to properly identify the Chain. View the Invert Elevations and confirm that the downstream elevation is lower than the upstream. The downstream must be lower than upstream.

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CHAPTER 14 CulvertsExercise

Exercise 14.1 (continued)

(exercise continued next page)

Step 47 Next, go to the Overtopping folder. Overtopping is an optional calculation. Set Overtopping Source to PGL. Key-in a Width of 44 and toggle on Pavement. Set Reference Chain to RDWY and Ref. PGL to PROP. Use the DP buttons to locate the Begin Station and End Station. Data on the graphical chain with these DP buttons or the user can key-in a Begin Station of 30+00 and an End Station of 50+00. Select one of the DP buttons and data one of the station ticks on the alignment in the design file may be necessary. This will “unghost” Extract PGL Profile. Change the X Increment to 50. The program can only place a total of 50 points in the data field and if the X Increment is left at 5, the program will automatically adjust that number, so that no more than 50 points are extracted. Select Extract PGL Profile. Notice how the program placed the extracted points every 50 feet and an elevation is extracted for that point from the TIN.

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CHAPTER 14 CulvertsIntroduction

EXERCISE 14.1 (CONTINUED)

Step 48 The last folder is Computations. Select Apply to store the Culvert. Toggle on Culvert, Tailwater, Overtopping, and Output to ASCII. Select Compute Culvert. Select View, to view the results. This will open a second window that the user can change the window size to see more of the computations.

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CHAPTER 14 CulvertsIntroduction

EXERCISE 14.2 CULVERT – CULV2 Using the previous class exercise as an example and the files located in the folder v8i_culv2, use GEOPAK Drainage Culvert to design a culvert at the approximate location of station 77+80. The drainage area is the magenta color shape. In the folder, v8i_culv2 is a new GEOPAK Road project, gpk, TIN, and design file. The county is Ellis.

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15 COMPREHENSIVE EXERCISE

15.1 Comprehensive Exercise

The following exercise gives you the opportunity to recall most of the GEOPAK Drainage functions introduced during this class. Use the information below to create a storm sewer network.

Directory: C:\Engdata\v8i_drainageclass\v8i_comp_ex

Design Files: main file – compmdf.dgn contour file – compcontours.dgn planimetric file – comp2d.dgn land use file – compland.dgn roadway shape file – compshape.dgnGEOPAK Road Project: comp_ex

Misc. Data: chain – ALIN profile – DVERT

Note: Drainage Area names and Inlet names need to be the same. Note: Drainage Area shapes are present but still need to have calculations.

1) Create a drainage project (Drain_Comp) using the following Drainage Project Preferences: (Generally, same as the work book) Drainage Library: C:\Engapps\TXDOTGPK\Drainage\TxDOT_V8i.dlb Spread Section (in Drainage Library): 31width DDB: C:\Engapps\TXDOTGPK\DDB\TxDOT_V8iDrain.ddb Shape File: compshape.dgn TIN File: prop.tin GPK File: job13.gpk Cell Library: C:\Engapps\TXDOTGPK\Drainage\TxDOT_V8iDrain.cel RainFall Parameters: County = Lee Land Use Options: TxDOT Land Use Minimum TC: 10.002) Place curb inlet, on grade, TYCCI10 (Areas Present) Sta. 9+75, dist. 31’ LT. & RT. Sta. 12+70, dist. 31’ LT. & RT. Sta. 15+70, dist. 31’ LT. & RT. Pond Depth: 0.50 Pond Width: 12.0 Allow Drop MH or Match Soffit

(exercise continued next page)

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CHAPTER 15 Comprehensive ExerciseComprehensive Exercise

3) Place Junctions, MH5D Sta. 15+90, dist. 47’ RT. Sta. 18+67, dist. 47’ RT.

4) Place Outlet, HDSET36 Sta. 19+00, dist. 80’ RT., -45^ Angle

5) Place Links Link Constraints – Min Rise: 2.0’, Max Rise: 5.0’ % Slope: 0.4 – 10.0 Velocity: 1.0 – 10.0

6) Create Network

7) Create and draw a Profile