1. Arc Hydro for EPA Basins
David R. Maidment, University of Texas at Austin
Dean Djokic, ESRI, Redlands
Implement Basins on Arc Hydro now for a region of interest
Examine new environment-wide modeling approaches for specific constituents e.g. Mercury, bacteria
Notes:
Industrial partners: ESRI, Danish Hydraulic Institute, Camp,Dresser and McKee, Dodson and Associates
Government partners:
Federal: EPA, USGS, Corps of Engineers (Hydrologic Engineering Center)
State: Texas Natural Resource Conservation Commission, Texas Water Development Board
Local: Lower Colorado River Authority, City of Austin, Dept of Watershed Protection
Academic Partners: University of Texas, Brigham Young University, Utah State University

2. Hydrologic Information System
Hydrologic Modeling
Arc Hydro
Geodatabase

3. Arc Hydro Extension for EPA Basins
Arc Basins –
Builds on core Arc Hydro landscape representation
Provides additional feature datasets and tables to store Basins data
Arc Hydro
Feature classes
Basins feature
classes

4. Arc Basins as one geodatabase

5. Arc Basins as two related databases
Connect these two databases using relationships
Geodatabase stores
geographic feature classes
Relational database stores
purely tabular information

6. National Water Information System
Web access to USGS water resources data in real time

8. Arc Hydro Toolset Ver 1.0
This toolset has been jointly developed by ESRI (Dean Djokic and colleagues) and CRWR, and its presently being beta tested with a group of users.
Provides tools for processing raster and vector data
and populating the attributes of the Arc Hydro data model

9. Arc Hydro USA Arc Hydro Framework dataset for USA at 1:500,000 scale
Built from USGS and National Weather Service data
HydroPoints are active USGS stream gaging stations
Arc Hydro USA is an integrated Arc Hydro dataset for the continental United States built using:
USGS Extended Reach File 1 for HydroEdges
USGS 8-digit Hydrologic Unit watersheds for Watersheds
National Weather Service Lakes file for Waterbodies
USGS Streamflow gaging station file (active stations only) for HydroPoints
The streamlines from the reach file have been built into a Hydro Network.
The total size of this file as a personal geodatabase is 1.8GB

11. ArcGIS Hydro Data Model
Drainage System
Hydro Network
Flow
Time
Time Series
Channel System
Hydro Features

12. Thematic Layers supporting the Arc Hydro data model 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)

13. 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.

14. Integrating Data Inventory using a Behavioral Model
Relationships between
objects linked by tracing path
of water movement

17. Hydrologic Information System
Hydrologic Analysis
and Modeling
Arc Hydro
Geodatabase

19. Other Arc Hydro Implementations
USGS
Stream Stats
HEC
GeoRAS
GeoHMS
Streamstats

20. Conclusions Chief innovations of ArcGIS
Network, geodatabase, object modeling
Chief innovations of ArcHydro so far
HydroNetwork
New raster tools and methodology
HydroID – relationships
Integration of Time and Space in a single system
Geodatabase – convenient for working with large vector datasets (use larger packaging units than 8-digit HUC’s)

21. Arc Hydro for EPA Basins
David R. Maidment, University of Texas at Austin
Dean Djokic, ESRI, Redlands
Implement Basins on Arc Hydro now for a region of interest
Examine new environment-wide modeling approaches for specific constituents e.g. Mercury, bacteria
Notes:
Industrial partners: ESRI, Danish Hydraulic Institute, Camp,Dresser and McKee, Dodson and Associates
Government partners:
Federal: EPA, USGS, Corps of Engineers (Hydrologic Engineering Center)
State: Texas Natural Resource Conservation Commission, Texas Water Development Board
Local: Lower Colorado River Authority, City of Austin, Dept of Watershed Protection
Academic Partners: University of Texas, Brigham Young University, Utah State University