arc hydro and hydrologic models

Arc Hydro and HSPF

by David R. MaidmentCenter for Research in Water Resources

University of Texas at Austin

• Arc Hydro and hydrologic models• “Map to Map” application using Model

Builder • Interfacing HEC Models and the

Geodatabase

Aquaterra, Decatur GA12 July 2004

Arc Hydro and HSPF

• Arc Hydro and hydrologic models • “Map to Map” application using Model


Geodatabase

Hydrologic Information System

Modeling

Geodatabase

A hydrologic information system is a combination of geospatial and temporal hydrologic data with hydrologic models that supports hydrologic practice, science and education

Arc Hydro: GIS for Water Resources

• Arc Hydro– An ArcGIS data model

for water resources– Arc Hydro toolset for

implementation– Framework for linking

hydrologic simulation models

The Arc Hydro data model andapplication tools are in the publicdomain

Arc Hydro — Hydrography

Arc Hydro — Hydrology

Flow

Time

Time Series

Hydrography

Hydro Network

Channel System

Drainage System

Arc Hydro Components

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Feature

Waterbody

HydroIDHydroCodeFTypeNameAreaSqKmJunctionID

HydroPoint

HydroIDHydroCodeFTypeNameJunctionID

WatershedHydroIDHydroCodeDrainIDAreaSqKmJunctionIDNextDownID

ComplexEdgeFeature

EdgeType

Flowline

Shoreline

HydroEdge

HydroIDHydroCodeReachCodeNameLengthKmLengthDownFlowDirFTypeEdgeTypeEnabled

SimpleJunctionFeature

1HydroJunction

HydroIDHydroCodeNextDownIDLengthDownDrainAreaFTypeEnabledAncillaryRole

*

1

*

HydroNetwork

*

HydroJunction


HydroJunction


Arc Hydro FrameworkData Model

National Hydrography Dataset, NHD

Basins Waterbody(NHD)

Arc Hydro Framework For South Florida

Hydro Points

Nexrad over South Florida

• Real-time radar rainfall data calibrated to raingages

• Data received each 15 minutes

• 2 km grid• Stored by SFWMD in

Arc Hydro format

Nexrad data in Arc Hydro

Attribute series

Display as a temporallayer in ArcGIS Tracking Analyst

Database

GeoHMS

Basins

GeoRAS

InterfacePrograms

HMS

HSPF

RAS

GIS

GIS Preprocessors for Hydrologic Models

HMSIDM

HSPF IDM

RASIDM

Interfacedata models

HMS

HSPF

RAS

GIS

GeoDatabase

Arc Hydrodata model

Geographically Integrated Hydrologic Models

Arc Hydro and HSPF



Geodatabase

Regional Storm Water Regional Storm Water Modeling Program and Modeling Program and

Master Plan for San Master Plan for San AntonioAntonio

City ofSan Antonio

http://www.sara-tx.org/

http://www.sanantonio.gov/

Modeling System

Rainfall Data:Rain gagesNexrad

Calibration Data:FlowsWater Quality

Geospatial Data:City, CountySARA, other

FloodplainManagement

IntegratedRegional Water

Resources planning

CapitalImprovemen

tPlanning

FloodForecasting

Water qualityplanning

San Antonio Regional Watershed Modeling System

“Bring the models together”

• Historical Nexrad data – NWS and TNRIS archive

• Design rainfall maps – 2, 5, 10, 25, 50, 100 year design rainfalls as used for FEMA floodplain studies

• Real-time Nexrad data using web services (Tom Wesp)

Sources of Rainmap data

NEXRAD WSR-88D Radars in Central Texas(Weather Surveillance Radar-1988 Doppler)

scanning range = 230 km

Stage I: Just RadarStage II: gages, satellite, and surface temperatureStage III: Continuous mosaic from radar overlaps

NEXRAD Products:

Source: PBS&J, 2003

EWX – NEXRAD Radar in New Braunfels

Digital Rain Maps from National Weather Service (03/04/2004)

Digital Rain Maps from National Weather Service (03/29/2004)

Reading Historical Archives of NEXRAD Datasets from Internet

FTP Server

Local

Internet

Design Rainfall Maps

100yr 24h

100yr 06h 100yr 12h

Real-Time NEXRAD Datasets from Web Services

FEMA 100-year flood plain map in Bexar County

RC1 RU

09R CO

08R CO

07R CO06R CO

04R CO03R CO

01R CO02R CO

05R CO

Regional Watershed Modeling System Case Study

Rosillo Creekwatershed

• Arc Hydro Geodatabasefor whole watershed• HEC-HMS hydrology modelfor whole watershed• HEC-RAS hydraulic model for Rosillo Creek

Salado Creek watershed

Components:

Bexar County

Arc Hydro and HEC-HMS

Arc HydroSchematic Network

HEC-HMSHydrologic

Model

Calculates Flows

Arc Hydro and HEC-RAS

Arc HydroChannel

Cross Sections

HEC-RASHydraulic

Model

Calculates Water Surface

Elevations

HEC Data Storage System (DSS)(binary data file system shared by HEC models)

• An exact replica of the binary DSS files is stored in the ArcGIS geodatabase

• An Arc 9 Toolbox exchanges data between DSS and the geodatabase

Time series catalog

Many time series

Flow Change PointsModels communicate with

one another through Arc Hydro at designated points

Nexrad Map to Flood Map in Arc 9 Model Builder FLO

ODPLAIN MAP

Flood map as output

Model for flood flow

Model for flood

depth

HMS

Nexrad rainfall map as input

Map to Map Demo

Arc Hydro and HSPF



Geodatabase

HMSIDM


HMS

RAS

GIS

GeoDatabase

Arc Hydrodata model

GeoRAS

Connecting Arc Hydro and Hydrologic Models

GeoHMS

RASIDM

IDM Data Transfer Goal

• To store data in a manner so that it is readily transferable from geodatabase to HMS files, and visa versa.

HMS files HMS geodatabase

IDM Arc Hydro Compliance Goal

• Arc Hydro connectivity and naming conventions

Arc Hydro Geodatabase

HydroID

IDM Geodatabase

FeatureID

HEC-HMSProgram files

Element NamesHMSCode

The HMSCode.basin HMS text file

HMSSubbasin attribute table

HMSInitialConstant tableIDM

Connection between HMS feature classes and parameter tablesConnection

between HMS and IDM elements

Flow Network

Importing HMS Data

Use Visual Basic to develop codes for transferring data.

Constant Loss Rate (inches/hour)

Llano at Junction Model

Rainfall lost to infiltration

Snyder Time to Peak (hours)


Time to Peak

Modified Puls Storage (ac-ft)


Storage required to produce 5000

cfs flow

HMSIDM

RASIDM


HMS

RAS

GIS

GeoDatabase

Arc Hydrodata model

Geodatabase – Model Data Exchange

XML-Based Data Exchange

•Platform Independent

•Application Independent

•Ready to share with many third party applications

•Updates do not require code recompilation

XML Transformations

XSLT Processor

•HTML pages•XML docs•Text files

Input XML to be Transformed Input XSLT stylesheet (template rules)

External Apps

GIS Import/Export Data Exchange

FEMA Map Modernization

• Redoing Floodplain maps of the nation over the next 5 years

• Storing all data and models permanently in digital form on a server farm in North Carolina

• Using a “Management Information Portal” to enter information

• Spending $1.5 billion– This will create a digital hydraulic information

infrastructure for the whole nation

Conclusions

• An interface data model provides a convenient way of storing and visualizing the content of a hydrologic model

• Combination of interface data models and ArcGIS Model Builder provides a very efficient means of work flow automation

• How to integrate with HSPF?

arc hydro and hydrologic models

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