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Arc Hydro: GIS for Water Resources David R. Maidment University of Texas at Austin

Arc Hydro Culmination of a 3-yr effort GIS in Water Resources Consortium Customization of ArcGIS for water resources Arc Hydro toolset and application framework. Arc Hydro: GIS for Water Resources David R. Maidment University of Texas at Austin.

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Arc Hydro: GIS for Water Resources David R. Maidment University of Texas at Austin

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  1. Arc Hydro Culmination of a 3-yr effort GIS in Water Resources Consortium Customization of ArcGIS for water resources Arc Hydro toolset and application framework Arc Hydro: GIS for Water ResourcesDavid R. MaidmentUniversity of Texas at Austin

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

  3. IFeatureBuffer IFeatureBuffer : IRowBuffer IFeatureDraw IFeatureDraw : IUnknown Feature IFeature IFeature : IRow ArcGIS Introduces Geodatabase MS Access OracleSQL Server Informix DB2 • A new geographic data model • A new geographic database • Stored in an Relational Database (Geodatabase) • ArcObjects • Component Object Model (COM) objects that access geographic data • Works like MS Word, Excel, Powerpoint, ….

  4. Geodatabase Collection of FeatureDataSets Like a workspace FeatureDataSet Collection of FeatureClasses Like a Coverage FeatureClass Collection of Features Like a Coverage FeatureClass Feature Geographic Object Row in DBMS Table Geodatabase Model

  5. FeatureClass (table) Stream . . . OID Shape Type . . . Feature (row) 524 X,Y,Z,M, ... Channel Features • Features are geographic objects stored in relational database tables • Feature location is an attribute of type shape • Point, Multipoint, Line, Polygon • Attributes and geometry arestored together not in separate files as in Arc Info 7 and ArcView 3

  6. A holder for a set of feature classes having a common coordinate system and spatial extent FeatureClass (table) Stream . . . OID Shape Type . . . Feature (row) 524 X,Y,Z,M, ... Channel Feature DataSets GeoDatabase FeatureDataset FeatureClass Object Class

  7. Extensible Data Model Row Feature Measurement NetworkFeature Basin JunctionFeature EdgeFeature ComplexEdge SimpleJunction Stream Confluence Gage

  8. What is Arc Hydro? • An data infrastructure for storing and integrating hydro data within ArcGIS • A set of hydro objects built on top of ArcObjects • A set of standardized attributes • A vocabulary for describing data (glossary) • A toolset for implementing the data model

  9. Drainage System Hydro Network Flow Time Time Series Hydrography Channel System Arc Hydro Components

  10. Arc Hydro Data Model Hydrology Hydrography

  11. Data Model Based on Inventory Streams Drainage Areas Hydrography Channels Terrain Surfaces Rainfall Response Digital Orthophotos

  12. 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.

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

  14. Arc Hydro Framework dataset for USA at 1:500,000 scale Built from USGS and National Weather Service data MonitoringPoints are USGS stream gaging stations Arc Hydro USA

  15. Arc Hydro Framework Input Data Watersheds Waterbody Streams Monitoring Points

  16. Arc Hydro Framework

  17. Arc Hydro Framework Dataset for the Guadalupe Basin

  18. HydroNetwork through Canyon Lake Flowlines through water body Generic Junction (for topological connection of edges)

  19. HydroJunction has Waterbody Relationship

  20. National Hydro Data Programshttp://www.crwr.utexas.edu/giswr/nhdconf/nationalhydro.html National Elevation Dataset (NED) National Hydrography Dataset (NHD) Elevation Derivatives for National Application (EDNA) Watershed Boundary Dataset

  21. Hydrologic Cataloging Units (HUCS) Hydrologic Unit Code = 12100203 Guadalupe Basin (4 HUC’s) • 2015 HUC’s cover continental US • average area ~ 1 county

  22. Watersheds of the Guadalupe Basin NWS forecast Watersheds (flooding) Guadalupe HydroNetwork EPA TMDL Segments (water quality) TNRCC water availability points (water supply)

  23. Regional Analysis HydroNetwork to provide connectivity of flow through large regions Digital elevation model for terrain analysis within basins

  24. Scales of representation of Drainage Systems Basins – drainage areas for water resources management Watersheds – subdivision of Basin for a particular hydrologic purpose Catchments – subdivision of Basin into elementary drainage areas by physical rules Digital Elevation Model – land surface terrain grid cells

  25. Catchments, DrainageLines and DrainagePoints

  26. Catchments Subdivided at Watershed Outlet

  27. EDNA Catchments Average area = 7.5 km2 Designed for remapping of Nexrad data onto drainage units

  28. Arc Hydro Time Series Object TSDateTime TSValue FeatureID TSType

  29. National Water Information System Arc Hydro NWIS data retrieval tool Web access to USGS water resources data

  30. HydroID and HydroCode

  31. Retrieving NWIS Data • Select Gage Layer • Enter Period of Record

  32. Streamflow Time Series Arc Hydro Time Series Table

  33. Time Series Extracted to Excel(In Excel, use Data/Get External Data to query Geodatabase) Excel view Geodatabase view

  34. HRAP Cells for Nexrad Data Average area = 14.5 km2

  35. Coupling Spatial and Temporal Data 1 hour Nexrad Rainfall on the Guadalupe Basin October 13, 2001

  36. Water Balance in the Landscape Atmospheric Water Precipitation Evaporation Runoff Soil Water Surface Water Recharge Baseflow Groundwater

  37. EDNA Catchments Average area = 7.5 km2

  38. Intersection of Nexrad and Catchments Surface Water Balance Atmospheric Water Surface Water Soil Water

  39. Modflow Groundwater Cells Modflow Model of the Edwards-Trinity aquifer Average area = 2.6 km2

  40. Intersection of Nexrad and Modflow Cells Atmospheric Water Groundwater Balance Groundwater

  41. Intersection of Nexrad, Catchments and Modflow Atmospheric Water Soil Water Surface Water Groundwater

  42. What software do you need? • ArcView 8.2 • Viewing, querying existing geodatabases • Editing feature classes and adding data • Spatial Analyst for ArcGIS • To operate the raster tools in Arc Hydro • ArcInfo 8.2 • To build geometric networks and create new relationships

  43. Raster processing DEM processing Watershed delineation Vector processing Arc Hydro attributes Network analysis Time Series and Application Utilities Buttons Arc Hydro Tools Version 1.0

  44. Hydrologic Information System Analysis, Modeling, Decision Making Arc Hydro Geodatabase

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