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Arc Hydro and Modeling. Intrinsic Modeling – within a particular application eg Excel, ArcGIS Dynamic Linked Library – tightly coupled package of functions (e.g. LibHydro from HEC) Independent Modeling – separate hydrologic model with data exchange . Streams Drainage Areas Hydrography

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arc hydro and modeling
Arc Hydro and Modeling
  • Intrinsic Modeling – within a particular application eg Excel, ArcGIS
  • Dynamic Linked Library – tightly coupled package of functions (e.g. LibHydro from HEC)
  • Independent Modeling – separate hydrologic model with data exchange
slide2

Streams

Drainage Areas

Hydrography

Channels

Terrain Surfaces

Rainfall Response

Digital Orthophotos

Thematic

Layers

supporting the

Arc Hydro

data model

(from Michael Zeiler

“Modeling Our World”

Volume 2)

data model based on behavior
Data Model Based on Behavior

Follow 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
Integrating Data Inventory using a Behavioral Model

Relationships between

objects linked by tracing path

of water movement

intrinsic hydrologic modeling
Intrinsic Hydrologic Modeling
  • Dr Tarboton
    • DEM-based hydrologic modeling
  • USGS
    • Stream Stats
  • Mean annual flows and pollutant loads

Streamstats

http://ststdmamrl.er.usgs.gov/streamstats/expert.htm

dynamic linked library
Dynamic Linked Library

Can have

Fortran

subroutines

in a DLL

Muskingum

flow routing

slide7

Independent Hydrologic Model

VB progam reads and writes

text files

slide8

Analysis, Modeling,

Decision Making

Arc Hydro

Geodatabase

Interfaces to Arc Hydro Data and Models

Excel

ArcGIS

Relational Database

(Access)

Visual Basic

arcgis development at dhi

Water Resources Data Model

ArcGIS Hydro Data Model

ArcGIS GeoDatabase

ArcGIS Development at DHI
  • Extend the ArcGIS Hydro Data Model
dhi timeseries package
DHI TimeSeries Package
  • TimeSeries Package Architecture
three basic water problems
Three basic water problems
  • Too little water (Drought and water supply)
  • Too much water (Flooding)
  • Its dirty (Water Quality)

Also have significant GIS effort on environmental issues related to water such as habitat assessment

1996 texas drought
1996 Texas Drought
  • George W. Bush, (then Governor of Texas) asked: “Tell me how much water we have, how much water we’re using and how much water we need”
  • State water officials did not have adequate answers
texas water planning
Texas Water Planning
  • 1997 Texas Legislature passed Senate Bill 1 which provided for
    • State-wide geospatial data development (topography, hydrography, land use, soils and orthophotos)
    • Water planning in 14 regions rather than state-wide
    • Assessment of water availability for all water permits
hydrologic cataloging units hucs
Hydrologic Cataloging Units (HUCS)

Hydrologic Unit Code

= 12100203

Guadalupe Basin

(4 HUC’s)

  • 2015 HUC’s cover continental US
  • average area ~ 1 county
water availability in the guadalupe basin

Stream Gauge (14)

Water Diversion (440)

Water Availability in the Guadalupe Basin

Estimate water availability at each legally permitted water diversion point based on “naturalized” flow at stream gages and the effects of other permitted diversions

digital elevation model
Digital Elevation Model

San Marcos basin

National Elevation Dataset

30m x 30m cells

11,000,000 cells to cover San Marcos basin

70,000,000 cells to cover Guadalupe basin

estimating naturalized flow at diversion points

Ad

Af

Qd = Qf

Estimating Naturalized Flow at Diversion Points

Naturalized flow record at stream gage

(50 years of monthly flows)

Qf

Af

Qd

Estimated flow record at diversion point

Ad

length downstream
Length Downstream

Flow distance (D to F)

= Length Downstream (D)

– Length Downstream (F)

Length Downstream (F)

F

D

D

Seepage

losses

F

Length Downstream (D)

Arc Hydro attribute LengthDown

slide20

Water Rights

Analysis

Package

(WRAP)

50 year

series of

naturalized

monthly

flows at

stream gages

Hydrologic Modeling

GIS data for each diversion point

Water Availability Modeling

Letter to each

water permit

owner specifying % of permitted flow available during a drought

Completed for ~ 10,000 water permit holders, 1998-2002

slide21

Water Availability Assessment

(completed for ~ 10,000 permit holders, 1998-2001)

Texas Natural

Resources

Conservation

Commission

Hydrologic modeling by

engineering consultants

Letter to each

water permit

owner specifying % of permitted flow available during a drought

Geospatial data development

by Center for Research in Water Resources, Univ. of Texas

flood hydrology and hydraulics
Flood Hydrology and Hydraulics

ArcView

Input Data

DEM

ArcView

Flood

plain maps

HEC-GeoHMS

Hec-GeoRAS

HEC-RAS

Water

surface

profiles

HEC-HMS

Flood

discharge

status of the software
Status of the Software
  • HEC-GeoHMS ver 1.0 available from HEC for ArcView version 3 http://www.hec.usace.army.mil/software/software_distrib/geo-hms4arcview/geohmsprogram.html
  • Arc Hydro terrain and watershed functions replace some but not all of HEC-GeoHMS
  • HEC-GeoRAS ver 1.0 http://www.hec.usace.army.mil/software/software_distrib/geo-ras4arcview/georasprogram.html
  • ESRI has developed a beta-version of GeoRAS for ArcGIS
crwr prepro a precursor of hec geohms
CRWR-PrePro (a precursor of HEC-GeoHMS)

Digital Elevation Model

Stream Map

ArcView-based preprocessor

for HEC-Hydrologic Modeling

System (HEC-HMS)

Control point locations

Soil and Land Use Maps

HMS Basin File

selected watersheds and streams
Selected Watersheds and Streams

Mansfield Dam

Colorado

River

hms schematic prepared with crwr prepro
HMS Schematic Prepared with CRWR-PrePro

Mansfield Dam

Colorado

River

hms results
HMS Results

Watershed 155

Junction 44

flood hydrology and hydraulics1
Flood Hydrology and Hydraulics

ArcView

Input Data

DEM

ArcView

Flood

plain maps

HEC-GeoHMS

Hec-GeoRAS

HEC-RAS

Water

surface

profiles

HEC-HMS

Flood

discharge

colorado river network
Colorado River Network

1:100,000 scale

Developed from

National Hydrography Dataset

city of austin stream network
City of Austin Stream Network

Developed from 1”=100’

Capco Areal photogrammetry

1:1200 scale

stream definition waller creek
Stream Definition: Waller Creek

Austin Watersheds with Streamsderived from Aerial Photographs

Streamlines generated by the aerial photographs are not always continuous.

information for correcting stream network
Information for Correcting Stream Network
  • DEM
  • Contours
  • Storm sewers
  • Orthophotos
resulting corrected stream
Resulting Corrected Stream
  • Subsequent steps:
  • Verification of corrected streams by flood hydrologists.
  • Running “tracer” program to connect arcs.
  • Burning of streams into DEM.
flood hydrology and hydraulics2
Flood Hydrology and Hydraulics

ArcView

Input Data

DEM

ArcView

Flood

plain maps

HEC-GeoHMS

Hec-GeoRAS

HEC-RAS

Water

surface

profiles

HEC-HMS

Flood

discharge

hec ras background
HEC-RAS: Background
  • River Analysis System model of the U.S. Army Corps of Engineers
  • Input = cross-section geometry and flow rates
  • Output = flood water elevations

Cross-Section Schematic

waller creek
Waller Creek

Watersheds

Network

Channel

hec ras cross section description
HEC-RAS: Cross-Section Description
  • Points describe channel and floodway geometry
  • Bank station locations
  • Water surface elevations and floodplain boundaries
hec ras output
HEC-RAS: Output

Graphical

Text File

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