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Hydrologic Modeling. David R. Maidment, Oscar Robayo, Venkatesh Merwade, Carlos Patino, Nate Johnson, Sergio Martinez, Tim Whiteaker, Dan Obenour Center for Research in Water Resources University of Texas at Austin. Modeling. Geodatabase. Hydrologic Information Systems.

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hydrologic modeling

Hydrologic Modeling

David R. Maidment, Oscar Robayo, Venkatesh Merwade, Carlos Patino, Nate Johnson, Sergio Martinez, Tim Whiteaker, Dan Obenour

Center for Research in Water Resources

University of Texas at Austin

slide2

Modeling

Geodatabase

Hydrologic Information Systems

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

slide3

GIS Preprocessors for Hydrologic Models

GIS

InterfacePrograms

HMS

Geo

HMS

Database

RAS

Geo

RAS

slide4

Connecting Arc Hydro and Hydrologic Models

GIS

Interfacedata models

HMS

HMS

IDM

Geo

Database

Arc Hydro

data model

RAS

RAS

IDM

slide5

GeoRAS

Connecting Arc Hydro and Hydrologic Models

GIS

Interfacedata models

HMS

HMS

IDM

GeoHMS

Geo

Database

Arc Hydro

data model

RAS

RAS

IDM

slide6

Development of a Geographic Framework for an Integrated Flood Modeling System

By

David Maidment

Oscar Robayo

Tim Whiteaker

Dan Obenour

University of Texas at Austin

Center for Research in Water Resources

Department of Civil Engineering

August, 2004

slide8

San Antonio Regional Watershed Modeling System

Geospatial Data:

City, County

SARA, other

“Bring the models

together”

Modeling

System

Rainfall Data:

Rain gages

Nexrad

Calibration Data:

Flows

Water Quality

Floodplain

Management

Capital

Improvement

Planning

Water quality

planning

Integrated

Regional Water

Resources planning

Flood

Forecasting

slide9

Objectives

  • Develop a geographically integrated flood modeling system using ArcGIS and the HEC models using Salado Creek in San Antonio as a case study
  • Drive this system with digital rain maps to generate flood maps
  • Store and generate HEC flood models from an ArcGIS geodatabase
  • Develop a scenario management system to generate and evaluate alternative plans
slide10

Objectives

  • Develop a geographically integrated flood modeling system using ArcGIS and the HEC models using Salado Creek in San Antonio as a case study
  • Drive this system with digital rain maps to generate flood maps
  • Store and generate HEC flood models from an ArcGIS geodatabase
  • Develop a scenario management system to generate and evaluate alternative plans
slide11
NEXRAD WSR-88D Radars in Central Texas(Weather Surveillance Radar-1988 Doppler)scanning range = 230 km

EWX – NEXRAD Radar

in New Braunfels

Source: PBS&J, 2003

slide17

Design Rainfall Maps

100yr 06h

100yr 12h

100yr 24h

slide18

Regional Watershed Modeling System Case Study

Salado Creek

watershed

Components:

  • Arc HydroGeodatabase
  • for whole watershed
  • HEC-HMShydrology model
  • for whole watershed
  • HEC-RAShydraulic model
  • for Rosillo Creek

Bexar County

Rosillo Creekwatershed

arc hydro and hec hms
Arc Hydro and HEC-HMS

HEC-HMS

Hydrologic

Model

Arc Hydro

Schematic

Network

Calculates

Flows

arc hydro and hec ras
Arc Hydro and HEC-RAS

HEC-RAS

Hydraulic

Model

Calculates

Water Surface

Elevations

Arc Hydro

Channel

Cross Sections

hec data storage system dss binary data file system shared by hec models
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 points
Flow Change Points

Models communicate with

one another through Arc Hydro

at designated points

information flow
InformationFlow

Rainfall

1

HEC-RAS

HEC-HMS

3

Streamflow

2

Flood Elevations

Streamflow

4

nexrad map to flood map in arc 9 model builder

FLOODPLAIN MAP

Nexrad Map to Flood Map in Arc 9 Model Builder

Flood map

as output

Model for

flood flow

HMS

Model

for flood

depth

Nexrad rainfall map as input

slide26

Objectives

  • Develop a geographically integrated flood modeling system using ArcGIS and the HEC models using Salado Creek in San Antonio as a case study
  • Drive this system with digital rain maps to generate flood maps
  • Store and generate HEC flood models from an ArcGIS geodatabase
  • Develop a scenario management system to generate and evaluate alternative plans
slide27

Connecting Arc Hydro and Hydrologic Models

GIS

Interfacedata models

HMS

Geo

Database

Arc Hydro

data model

RAS

WRAP

hec interface data models
HEC Interface Data Models

HMS files

HMS IDM

RAS files

RAS IDM

idm arc hydro compliance
IDM Arc Hydro Compliance
  • Arc Hydro connectivity and naming conventions

Arc Hydro

Geodatabase

IDM

Geodatabase

HEC

Program files

HydroID

FeatureID

HMSCode

Element Names

constant loss rate inches hour
Constant Loss Rate (inches/hour)

Llano at Junction Model

Rainfall lost to infiltration

snyder time to peak hours
Snyder Time to Peak (hours)

Llano at Junction Model

Time to Peak

modified puls storage ac ft
Modified Puls Storage (ac-ft)

Llano at Junction Model

Storage required to produce 5000 cfs flow

xml based data exchange
XML-Based Data Exchange
  • Platform Independent
  • Application Independent
  • Ready to share with many third party applications
  • Updates do not require code recompilation
slide35

Objectives

  • Develop a geographically integrated flood modeling system using ArcGIS and the HEC models using Salado Creek in San Antonio as a case study
  • Drive this system with digital rain maps to generate flood maps
  • Store and generate HEC flood models from an ArcGIS geodatabase
  • Develop a scenario management system to generate and evaluate alternative plans
preliminary interface data model for hspf

Preliminary Interface Data Model for HSPF

Nate Johnson & David Maidment

ESRI User’s Conference

San Diego, CA

August 8, 2004

slide37

Interface Data Model for HSPF

Arc Hydro

(demo)

  • Preliminary Geodatabase for HSPF IDM:

Intermediate

To BASINS

slide38

GenScn:Generalized Scenario Management

  • GenScn is a open source, public domain program distributed with the USEPA’s BASINS software
  • Primarily designed for postprocessing timeseries data from HSPF models
  • Links Geospatial data (shapefiles) to Timeseries data and allows users to interact with the data
slide39
Organizing and selecting timeseries that describe geospatial data
  • Timeseries are organized around 3 key attributes:
    • Location (can be linked to geospatial data)
    • Scenario (can be used for scenario management)
    • Constituent (what the timeseries describes)

(demo)

slide41
Arc Hydro and GenScn
    • CRWR has worked on reading Arc Hydro timeseries into GenScn’s representation to make it available to GenScn’s tools
    • When completed, will also facilitate the transfer of timeseries from Arc Hydro format to .wdm, and vice versa
    • .wdm is the time series format used by EPA Basins systems
instream flow studies

Habitat

Model

Instream

Flow

DecisionMaking

Instream Flow Studies

Criterion

Depth & velocity

Species groups

Hydrodynamic

Habitat

Model

Descriptions

Biological Data Collection

SMS/RMA2

ArcGIS

habitat modeling
Habitat Modeling

Velocity + Depth + Habitat Description

mesohabitat output
Mesohabitat Output

Mesohabitat output for 41.22 m3/s.

slide45

Priority Segments in Texas for Instream Flow Studies

  • Priority segments are 100s of miles long
  • Representative reaches (study areas) are only a few (<5) miles long
data representation
Data representation

Profile lines and cross-sections

Points

r iver c hannel m orphology m odel

4

River Channel Morphology Model
  • Get the shape (blue line or DOQ)
  • Using the shape, locate the thalweg
  • Using thalweg location, create cross-sections
  • Network of cross-sections and profile lines

1

2

3

normalizing the data

nL

nR

0

-

+

Z

P(ni, zi)

d

Zd

w = nL + nR

Normalizing the data

For any point P(ni,zi), the normalized coordinates are:

n* = (ni – nL)/w

z* = (Z – zi)/d

For nL = -15, nR = 35, d = 5, Z=10

P (10, 7.5) becomesPnew(0.5, 0.5)

cross sections as beta pdfs
Cross-sections as beta pdfs

beta c/s = (beta1 + beta2) * k

a1=5, b1=2, a2=3, b2=3, factor = 0.5

a1=2, b1=2, a2=3, b2=7, factor = 0.6

Create beta cross-sections for different thalweg locations

hydraulic geometry relationships
Hydraulic Geometry Relationships

Hydraulic geometry relationships for Brazos River at Richmond.

Hydraulic geometry relate flow with channel width, depth, and velocity.

Channel measurements can be downloaded from USGS website.

(http://waterdata.usgs.gov/nwis/sw)

river channel demo
River Channel Demo
  • Show the Brazos basin and priority instream flow segments in the basin
  • Select a reach (@10 miles) along the Lower Brazos river
  • For the selected reach, use the RCMM toolbar to
    • Generate thalweg using the channel boundary
    • Generate cross-sections using the thalweg
    • Generate profile-lines using the cross-sections
  • Show the 3D river channel form generated by RCMM in ArcScene
slide55
Water Management Information System

for the Rio Grande/Rio Bravo Basin

Carlos Patino

Daene McKinney

David Maidment

August, 2004

collaboration between usa mexico
Collaboration between USA-Mexico
  • Cooperation of
    • CRWR (Center for Research in Water Resources) of the University of Texas at Austin,
    • CNA (Mexican National Water Commission), and
    • IMTA (Mexican Institute of Water Technology)
  • Has resulted in the development of an Arc Hydro geodatabase for the Rio Grande/Bravo basin
  • A one-stop shop for geospatial and temporal water resources information for the basin
  • Training materials in english and spanish on GIS Hydro 2004
slide57

Mexico: 7 Hydrologic subregions

(228,000 km2)

USA: 9 Hydrologic Subregions

(327,000 km2, closed basins included)

Total Area: 555,000 km2

slide59

RIO GRANDE DEMO

Showing the hydrological subregions

Network Tracing analyst Showing the relationships among HydroJunction, monitoring points, Watersheds, and HydroEdges (Use HydroJunction 2020100022)

Showing the time series related to La Boquilla dam.