Download - Ssa Presentation

8/12/2019 Ssa Presentation

1/28

2011 Autodesk

Drainage Design and Analysis with

Autodesk Storm and Sanitary Analysis (SSA)

Steve StamatoplosCivil Technical Specialist

Engineering, Natural Resources, Infrastructure


2/28

2010 Autodesk, Slide 2

Introduction and Overview


3/28


SSA History

Background

Autodesk, Inc. acquired certain assets of

BOSS International, including BOSS

StormNET Stand-Alone technology

Launched it as Autodesk Storm and

Sanitary Analysis Stand-Alone 2011

Now included with Infrastructure DesignSuite, Civil 3D, and Map 3D

Development

Software developed from latest version of

EPA SWMM engine

Additional Hydrology methods

Easy to use GUI

Advanced Profile Plot

Addition of FHWA HEC-22 Inlets, Neenah

Foundry, and Caltrans

Interoperability with Autodesk Products


4/28 2010 Autodesk, Slide 4

Interoperability

In order to more seamlessly sharedata with other software, SSA

provides the following

interoperability:

AutoCAD DWG Support

GIS Shapefile Support

LandXML Import & Export Import & Export of Hydraflow Storm

Sewers Extension files (*.stm)

Import & Export EPA SWMM Models

Import & Export XPSWMM Models


5/28


Engineering Background


6/28


Hydrologic Capabilities of SSA

SSA includes the following hydrologymethods to determine drainage area runoff:

US EPA SWMM

Rational Method

Modified Rational Method

DeKalb Rational Method

NRCS (SCS) TR-20

NRCS (SCS) TR-55

Santa Barbara Unit Hydrograph (SBUH)

US Army Corps HEC-1

UK Hydrology (Wallingford Procedure

Modified Rational Method)

Project Options


7/28


Hydraulic Capabilities of SSA

SSA includes the followinghydraulic routing methods:

Steady Flow

Kinematic Wave (default

method)

Hydrodynamic

Project Options


8/28


Hydrodynamic Routing

Most sophisticated routing method Solves the complete 1-D Saint Venant flow

equations to produce the most accurate

results

Accounts for pressurized flow, channelstorage, backwater effect, entrance and exit

losses, adverse slope conduits, looped

network

Force Mains are modeled using Hazen-

Williams or Darcy-Weisbach equationsAppropriate for any network analysis, method

of choice for systems subjected to backwater

effects


9/28


Defining a Network Model


10/28


SSA Stormwater Model Representation

Model is constructed using thefollowing elements:

Subbasins

Nodes

Links

Rainwater (called precipitation) falls

onto subbasins

Runoff occurs within the subbasin,

and then enters a downstream

node (or another subbasin if using

EPA SWMM hydrology)

Nodes are connected togetherusing links

Links allow water to travel (called

routing) from node to node


11/28


12/28


Node Elements

Nodes are a generic term used to representmany nodal type elements

Junction

Manholes (storage accounted as 4 ft manhole)

Computational point along a link, like along a stream or

internally within a pipe

Storm drain inlets (catchbasins)

Storage nodes

Detention ponds

Other storage type nodes where water is stored (e.g.,

junction box)

Outfalls

Nodes are computational points in the model

where WSEL is computed at each time step

Locations where flow can enter the network

(inflows) or leave the network (outflows)


13/28


Link Elements

Links are a generic term used torepresent many link type elements

Conveyance Link

Pipe

Open channel (i.e., river, stream, ditch, gutter)

Pump

Orifice

Weir (spillway)

Outlet

Links allow flow to be transported

(routed) from node to node


14/28


Civil 3D and SSA Workflow


15/28


Typical Workflow With Civil 3D

Layout storm system in Civil 3D (rules applied to design system in 3-dimensions)

Establish subbasins for storm system in Civil 3D (use catchment object

tool, water drop tool)

Edit System in SSA

Define project and analysis options Connect gutters, Refine model as necessary

Run the analysis

View analysis output results

Adjust pipe sizing as necessary to handle the analyzed storms

Export the file to .STM from SSA

Import the file into Civil 3D


16/28


.STM File Interoperability Notes

Parts Conversion is based onPart Matching Settings within a

set Parts List

OR

User can allow part family

swapping (including custom

parts) via Pipe Network Feature

Settings


17/28


Hydraflow/SSA Differences


18/28

2012 Autodesk

Portfol io Differences

Hydraflow

Extension

Simple SCS DesignMethods, Simple

Hydrology

Simple HydraulicCalculations,

Standard Step

Peak Flow

Storm and SanitaryAnalysis (SSA)

Continuous Rainfall,Design Methods, Complex

Hydrology

Complex HydraulicCalculation

Dynamic Wave

Continuity


19/28

2012 Autodesk

Side-by-Side

Hydraflow

FHWA HEC-22 Chapter 4Inlet Calculations

No capability

Hydrographs: Pond and ChannelRouting

SSA

FHWA HEC-22 Chapter 4

Custom Performance Curves

Neenah Inlets

Pumps & Forcemains,

Flow Reversal,

Back-pitched pipes

Pond Routing, Overland,Channel Flow Routing of pipe

network


20/28


Storm Sewer

Modeling and Analysis


21/28


Drainage Analysis

In this example, you will see how to: Model and analyze storm sewer networks in Civil 3D and Storm

and Sanitary Analysis

Use tools SSA to set Project and Analysis options and

methodologies to accurately analyze the system

Produce reports summarizing the design and analysis of drainage

systems

Bring analyzed and adjusted network back to Civil 3D to update the

design model


22/28



23/28


24/28


Detention Pond

Modeling and Analysis


25/28


Pond Design & Analysis

In this example, you will see how to: Model and analyze detention basins in Civil 3D and Storm and

Sanitary Analysis

Use tools in Civil 3D and Storm and Sanitary Analysis to determine

site hydrology for a number of methodologies

Produce reports summarizing the design and analysis of

stormwater management basins

Account for current regulatory requirements, such as infiltration

Drainage with SSA


26/28


Overview of Workflow

In Civil 3D, prepare pond surface for stage storage analysis

Run stage storage tool and create table

Setup storage node in SSA file

Create a storage curve based on data from Civil 3D

Establish elevations of storage node

Create an emergency spillway in SSA

Model an outlet structure with an orifice and weirs

Configure exfiltration

Run analysis and review results

Detention Ponds in Civi l 3D and SSA

Drainage with SSA


27/28



28/28