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CEE 795 Water Resources Modeling and GIS

CEE 795 Water Resources Modeling and GIS. Lecture 7: HEC-RAS and Geo-RAS March 6, 2006. Learning Objectives: Describe the HEC-River Analysis System (RAS) Model Utilize HEC Geo-RAS to import data into RAS. Assignments: Exercise #6. Handouts: Ras-example.doc. HEC-RAS.

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CEE 795 Water Resources Modeling and GIS

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  1. CEE 795Water Resources Modeling and GIS Lecture 7: HEC-RAS and Geo-RAS March 6, 2006 Learning Objectives: • Describe the HEC-River Analysis System (RAS) Model • Utilize HEC Geo-RAS to import data into RAS Assignments: Exercise #6 Handouts: Ras-example.doc

  2. HEC-RAS • River Analysis System • Developed by Hydrologic Engineering Center (HEC) • One dimensional steady and unsteady flow analysis • Subcritical, supercritical, and mixed flow regime calculations

  3. HEC-RAS cont. • Manual Data Input Required • stream centerline • cross sections • Manning’s “n” • flow data

  4. Main Menu

  5. Geometric Data (stream configuration)

  6. Cross Sections

  7. Table Output

  8. Profiles

  9. HEC GeoRAS • Pre-RAS processor • Creates HEC-RAS input file • Input Needs • Triangular Irregular Network (TIN) • Land Use Data

  10. HEC GeoRAS • Developed by Hydrologic Engineering Center (HEC) • pre and post Data Processor for the River Analysis System (HEC-RAS)

  11. HEC GeoRAS(creating a TIN from topography)

  12. HEC GeoRAS(creating a TIN from topography)

  13. HEC GeoRAS(input Triangular Irregular Network)

  14. HEC GeoRAS • Pre-RAS processor • Saves time on data input • no manual cross section entry • no manual Manning’s “n” entry

  15. HEC GeoRAS (Pre-Processing) Centerline Banks Cross Sections

  16. HEC GeoRAS (Cross Section)

  17. HEC GeoRAS • Post-RAS processor • Accepts HEC-RAS output file • Output Formats • Creates floodplain TINs • Creates depth and velocity maps • Saves time on data presentation

  18. HEC GeoRAS (Post Processing)

  19. HEC GeoRAS (Floodplain Delineation)

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