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

Hydrologic Information System Hydrologic Modeling Arc Hydro Geodatabase

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

Arc Basins as one geodatabase

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

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

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

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

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

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)

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 Relationships between objects linked by tracing path of water movement

Hydrologic Information System Hydrologic Analysis and Modeling Arc Hydro Geodatabase

Other Arc Hydro Implementations USGS Stream Stats HEC GeoRAS GeoHMS Streamstats

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)

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