1. Flow Time Time Series Hydro FeaturesHydro Network Channel System Drainage System ArcGIS Hydro Data Model

2. HEC tools and ArcHydro Flow Time Time Series Hydro FeaturesHydro Network Channel System Drainage System HEC-GeoHMS HEC-GeoRAS DSS National Hydro Data CWMS

3. GIS in Water Resources Consortium Bringing together these two communities by using a common geospatial data model http://www.crwr.utexas.edu/giswr GIS CRWR Water Resources

4. Arc Hydro Milestones Feb 1999 project initiated July 1999 Consortium established August 1999 kickoff meeting of Consortium Feb 2000 GIS in Water Resources Conference in Austin June 2000 First draft data model and book completed for GIS Hydro 2000 workshop in San Diego Dec 2000 NHD Applications Symposium in Austin Feb 2001 Arc Hydro design completed July 2001 Revised book to be completed for GIS Hydro 2001 workshop in San Diego

5. Geodatabase Book Series General Geodatabase in ArcInfo 8 Geodatabase models for application areas

6. CD-ROM at back of book ArcGIS Hydro UML diagrams, Repository, Example Geodatabases

7. ArcGIS Hydro Data Model Hydrography Hydrology

8. ArcGIS Hydro Implementation Geodatabase Feature Dataset Feature Class Geometric Network Object Class Relationship

10. GIS in Water Resources Consortium ArcGIS Hydro Data Model Feb 28, 2001 Hydro Features

11. GIS in Water Resources Consortium ArcGIS Hydro Data Model Feb 28, 2001 Hydro Network

12. GIS in Water Resources Consortium ArcGIS Hydro Data Model Feb28, 2001 Drainage

13. GIS in Water Resources Consortium ArcGIS Hydro Data Model Feb 28, 2001 Channels

14. GIS in Water Resources Consortium ArcGIS Hydro Data Model Feb 28, 2001 Time Series

15. National Hydro Data Programs http://www.crwr.utexas.edu/giswr/nhdconf/nationalhydro.html National Elevation Dataset (NED) National Hydrography Dataset (NHD) Watershed Boundary DatasetNED-Hydrology

16. Watersheds of the US 2-digit water resource regions 8-digit HUC watersheds

17. Hydrologic Unit Code Watersheds ~ 2000 for US, about the size of counties

18. Watershed Hierarchy 8 HUC 4 2 6 NED-H 10 12 AvailableIn Progress Digit #

19. Watershed Boundary Dataset National Program by USGS and USDA (NRCS) Boundaries for 10- and 12- digit watersheds First cut is by automated delineation from NED Hand checked and edited 10-digit watersheds

20. National program by USGS and NWS 5000 cell threshold on a 30m DEM (~ 8 km 2 average drainage area) ~ 1 million catchments for US when completed Includes grid derived products e.g. topmodel index

21. EPA River Reach File 1 (RF1)

22. River networks for 8-digit HUC watersheds

24. Lower West Fork, Trinity River Basin HUC = 12030102

25. NHD River Reaches 412 River Reaches In Upper West Fork

26. River Reach Codes Rch_Code = 12030102000151 Rch_Code = 12030102000005 HUC# Segment#

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

28. National Hydro Data Programs http://www.crwr.utexas.edu/giswr/nhdconf/nationalhydro.html National Elevation Dataset (NED) National Hydrography Dataset (NHD) Watershed Boundary DatasetNED-Hydrology

29. How do we combine these data? DEMs WatershedsStreamsWaterbodies

30. An integrated raster-vector database

31. Data Model Based on Inventory NHD Points Gages NHD Areas NHD Lines Dams Bridges Make an inventory of all features of a given type in the region What is it? Where is it?

32. 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.

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

34. Where Does the Raindrop Go? Dale Honeycutt’s concept, May 2000

35. Water Flows from an Area to a Line Problems with this: Areas and lines are not always consistent with one another. Sometimes many lines within one area.

36. How to Connect Areas to Hydronetwork? Outlet Points Areas connect to lines at points Regardless of where the drop falls in the area, its runoff is on the network at the outlet point

37. Where Does the Raindrop Go? Watershed DEM Flow direction and DEM streams Drainage area and raindrop path

38. HydroNetwork Watershed and Stream Reaches Catchments and Outlet Junctions Downstream trace

39. Traces and Relationships Upstream Trace Selected Catchments + Downstream trace

40. Basins and Watersheds Upper Washita Basin (HUC8)10-digit watersheds and outlets Watershed 1113030213

41. Downstream Trace Watershed 1113030213 NHD for the Upper Washita

42. Scales of Analysis Network for larger areas DEM for smaller areas (Up to 20 million cells)