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Floodplain Analysis with ArcGIS Model Builder

Floodplain Analysis with ArcGIS Model Builder. Donghyun Rim University of Texas at Austin. What is floodplain and why is it important?. Floodplain - the lowland adjacent to a river, lake or ocean.   Floodplains are designated by the frequency of the flood that is large enough to cover them.

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Floodplain Analysis with ArcGIS Model Builder

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  1. Floodplain Analysis with ArcGIS Model Builder Donghyun Rim University of Texas at Austin

  2. What is floodplain and why is it important? • Floodplain - the lowland adjacent to a river, lake or ocean.   • Floodplains are designated by the frequency of the flood that is large enough to cover them. • The National Flood Insurance Program has established a minimum standard of protection against the 100-year flood. • Flood damage reduction – critical interest

  3. Work Site Austin Waller Creek

  4. Conceptual Process • Rainfall input • Topologic dataset of the watershed of Waller Creek • Runoff Simulation by using HEC-HMS • Calculation of water surface-elevations along the channel with HEC-RAS • Transformation of water-surface elevation to a unique inundation area known as flood plain

  5. Marvelous Toolbox-MAP2MAP Developed by Oscar Robayo

  6. Rainfall Map to Flood Inundation Map Transfer Data from NEXRAD Cell to Subbasins NEXRAD Rainfall Data Import into Geodatabase Export Timeseries of Rainfall to HEC-DSS Streamflow Hydrographs HEC-HMS Runoff Data (HEC-DSS) to GIS Water Surface Elevation File HEC-RAS Polygon as Inundated Area Convert WSE to WS TIN Import to GIS as XML Format

  7. Data Collection 1. NEXRAD Rainfall Data 2. Topological Hydrography

  8. 3. HEC-HMS 4. HEC-RAS

  9. 5.DEM 6. Orthographic Photo

  10. Creation of Compatible Data

  11. Result for Rosillo Creek

  12. Future Work • Use of 10 m cell DEM for delineation of Watershed. • Perform Map2Map run for Waller Creek. • Use of rainfall for another time period

  13. Special thanks to • Dr. Maidment • Oscar Robayo • Laton Carr

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