Flow Time Time Series Hydro FeaturesHydro Network Channel System Drainage System ArcGIS Hydro Data...

Flow

Time

Time Series

Hydro Features

Hydro Network

Channel System

Drainage System

ArcGIS Hydro Data Model

HEC tools and ArcHydro

Flow

Time

Time Series

Hydro Features

Hydro Network

Channel System

Drainage System

HEC-GeoHMS

HEC-GeoRAS

DSS

National Hydro Data

CWMS

GIS in Water Resources Consortium

Bringing together these two communities by using a common geospatial data model

http://www.crwr.utexas.edu/giswr

GIS

CRWRCRWR

Water Resources

Arc Hydro Milestones

• Feb 1999 project initiated

• July 1999 Consortium established

• August 1999 kickoff meeting of Consortium

• Feb 2000 GIS in Water Resources Conference in Austin

• June 2000 First draft data model and book completed for GIS Hydro 2000 workshop in San Diego

• Dec 2000 NHD Applications Symposium in Austin

• Feb 2001 Arc Hydro design completed

• July 2001 Revised book to be completed for GIS Hydro 2001 workshop in San Diego

Geodatabase Book Series

General Geodatabasein ArcInfo 8

Geodatabasemodels forapplicationareas

CD-ROM at back of book

ArcGIS Hydro

UML diagrams, Repository,Example Geodatabases

ArcGIS Hydro Data Model

Hydrography Hydrology

ArcGIS Hydro ImplementationGeodatabase

Feature Dataset

Feature Class

Geometric Network

Object Class

Relationship

ArcGIS Hydro Data ModelFebruary 28, 2001

Hydro Features

HydroLine

Source Features

HydroFeature

Feature

HydroIDFeatureTypeIncludeOnNetworkName

Channels

Feature

How to readthis diagram

Copyright ESRI 2001. All Rights Reserved.

Types of Classes

An ESRI Object class cannot be used to create newobjects but is a specification for instances ofsubclasses (through type inheritance).

An Abstract class is a class for which no instancesmay be created. In a class diagram you indicate thata class is abstract by showing its title in italics.

A Feature class is a class for objects that inherit fromthe feature class. Feature classes can also beassociated with Coded Value Domains and Subtypes.

A Multiplicity is a constraint on the number of objects that canbe associated with another object. Association, aggregration andcomposition relationships have multiplicities on both sides. Thisis the notation for multiplicities: 1 One and only one (if none shown, '1' is implied) 0..1 Zero or one M..N From M to N (positive integers) * or 0..* From zero to any positive integer 1..* From one to any positive integer

Aggregation is an asymmetric association inwhich an object from one class is considered tobe a "whole" and objects from the other class areconsidered "parts".

Composition is a stronger form of aggregation inwhich objects from the "whole" class control thelifetime of objects from the "part" class.

Type Inheritance

Association 1..* Multiplicity

Domain Domain

Composition

ESRI Class

*

Abstract Class

Subtype

Attributes

FeatureClass

FeatureClass

Attributes Attributes

An N-ary association specifies that more thantwo classes are associated. A diamond is placedat the intersection of the association branches.This diagram has several examples of aninstantiation of an object from two other objects.

Subtype

HydroPoint

ProfileLineType

ProfileLine

Thalweg

RightBank

LeftBank

RightFloodLine

LeftFloodLine

Subtype

CrossSection

CrossSectionIDCrossSectionTypeProfileM

1

Object

Time Series

Flow

Time

Flow

GIS in Water ResourcesConsortium

CRWRCRWRCRWR

Structure

MonitoringPoint

HydroArea

AreaInSqKmWaterbodyID

Hydro Network

DrainagePoint DrainageArea

AreaInSqKmNextDownstream

1

Drainage

DrainageFeature

HydroIDDrainageID

Catchment

Feature

Basin

HydroResponseUnit

AreaInSqKm

Watershed

DrainageLine

ComplexEdgeFeature

HydroJunction

SimpleJunctionFeature

OutletJunction

HydroIDDrainageID

HydroIDWaterbodyID

Subtype

11

NaturalChannel

ConstructedChannel

Pipeline

Culvert

WaterbodyFlowline

Shoreline

Coastline

Connector

HydroEdge

HydroIDReachIDRiverIDNameLengthInKmLengthDownstreamFlowDirectionHydroEdgeType

ChannelFeature

HydroIDReachIDRiverID

WaterWithdrawal

Waterbody

HydroPointEvent

Measure

HydroLineEvent

FromMeasureToMeasure

CrossSectionPoint

CrossSectionIDCrossSectionMElevation

1

1..*TimeSeries

Object

FeatureIDTSTypeTSDateTimeTSValue

HydroEvent

MeasureID

Object

Bridge

Dam UserPoint

WaterDischarge

Types of Relationships

Associations represent relationships between classes.They have defined multiplicities at both ends.Type inheritance defines specialized classes ofobjects which share properties and methods with thesuperclass and have additional properties andmethods.Instantiation specifies that one object from one classhas a method with which it creates an object fromanother class.

GIS in Water Resources ConsortiumArcGIS Hydro Data Model

CRWRCRWRCRWRFeb 28, 2001

Hydro Features

HydroLine

Source Features

HydroFeature

Feature

HydroIDFeatureTypeIncludeOnNetworkName

HydroPoint

Structure

MonitoringPoint

HydroArea

AreaInSqKmWaterbodyID

WaterWithdrawal

WaterbodyBridge

Dam UserPoint

WaterDischarge



Hydro Network

ComplexEdgeFeature

HydroJunction

SimpleJunctionFeature

OutletJunction

HydroIDDrainageID

HydroIDWaterbodyID

Subtype

NaturalChannel

ConstructedChannel

Pipeline

Culvert

WaterbodyFlowline

Shoreline

Coastline

Connector

HydroEdge

HydroIDReachIDRiverIDNameLengthInKmLengthDownstreamFlowDirectionHydroEdgeType

HydroPointEvent

Measure

HydroLineEvent

FromMeasureToMeasure

HydroEvent

MeasureID

Object


CRWRCRWRCRWRFeb28, 2001

Drainage

DrainagePoint DrainageArea

AreaInSqKmNextDownstream

DrainageFeature

HydroIDDrainageID

Catchment

Feature

Basin

HydroResponseUnit

AreaInSqKm

Watershed

DrainageLine



Channels Feature

ProfileLineType

ProfileLine

Thalweg

RightBank

LeftBank

RightFloodLine

LeftFloodLine

Subtype

CrossSection

CrossSectionIDCrossSectionTypeProfileM

Object

ChannelFeature

HydroIDReachIDRiverID

CrossSectionPoint

CrossSectionIDCrossSectionMElevation

1

1..*



Time Series

Flow

Time

Flow

TimeSeries

Object

FeatureIDTSTypeTSDateTimeTSValue

National Hydro Data Programshttp://www.crwr.utexas.edu/giswr/nhdconf/nationalhydro.html

National Elevation Dataset (NED)

National Hydrography Dataset(NHD)

Watershed Boundary DatasetNED-Hydrology

Watersheds of the US

2-digit water resource regions 8-digit HUC watersheds

Hydrologic Unit Code Watersheds~ 2000 for US, about the size of counties

Watershed Hierarchy

8 HUC

4

2

6

NED-H

1012

Available In Progress

Digit #

Watershed Boundary Dataset

• National Program by USGS and USDA (NRCS)

• Boundaries for 10- and 12- digit watersheds

• First cut is by automated delineation from NED

• Hand checked and edited

10-digit watersheds

• National program by USGS and NWS

• 5000 cell threshold on a 30m DEM (~ 8 km2 average drainage area)

• ~ 1 million catchments for US when completed

• Includes grid derived products e.g. topmodel index

EPA River Reach File 1 (RF1)

River networksfor 8-digit HUC watersheds

Lower West Fork, Trinity River BasinHUC = 12030102

NHD River Reaches

412 River ReachesIn Upper West Fork

River Reach Codes

Rch_Code = 12030102000151

Rch_Code = 12030102000005

HUC# Segment#

National Water Information System

Web access to USGS water resources data in real time

National Hydro Data Programshttp://www.crwr.utexas.edu/giswr/nhdconf/nationalhydro.html

National Elevation Dataset (NED)

National Hydrography Dataset(NHD)

Watershed Boundary DatasetNED-Hydrology

How do we combine these data?

DEMs Watersheds Streams Waterbodies

An integrated raster-vector

database

Data Model Based on Inventory

NHD Points

Gages

NHD Areas

NHD Lines

Dams

Bridges

Make an inventory of all features of a given type in the region

What is it?Where is it?

Data Model Based on BehaviorFollow a drop of water from where it falls on the land, to the stream, and all the way to the ocean.

Integrating Data Inventory using a Behavioral Model

Relationships betweenobjects linked by tracing pathof water movement

AB

? ?

Where Does the Raindrop Go?

Dale Honeycutt’s concept, May 2000

AB

Water Flows from an Area to a Line

Problems with this: • Areas and lines are not always consistent with one another. • Sometimes many lines within one area.

AB

How to Connect Areas to Hydronetwork?

Outlet Points

Areas connectto lines at points

Regardless of where the drop falls in the area, its runoff is on thenetwork at the outlet point

Where Does the Raindrop Go?

Watershed DEM Flow direction andDEM streams

Drainage areaand raindrop path

HydroNetwork

Watershed and Stream Reaches

Catchments and Outlet Junctions

Downstreamtrace

Traces and Relationships

Upstream Trace Selected Catchments + Downstream trace

Basins and Watersheds

Upper Washita Basin (HUC8) 10-digit watersheds and outlets

Watershed 1113030213

Downstream Trace

Watershed 1113030213

NHD for theUpper Washita

Scales of Analysis

Network forlarger areas

DEM for smaller areas

(Up to 20 million cells)

Flow Time Time Series Hydro FeaturesHydro Network Channel System Drainage System ArcGIS Hydro Data...

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