HEC-RAS 3.0 Input Data and Demo Presented By: Kevin Donnelly

HEC-RAS Data Requirements Cross Section Geometry and Characteristics Bridge and Culvert Information Steady or Unsteady Flow Data Plan Information

Cross Section Geometry and Characteristics Import UNET cross section data into RAS

Cross Section Geometry and Characteristics Export data to GIS using a modified version of the procedure developed by former graduate student, Eric Tate (Learn more during project final presentation) Aligns cross sections with known points (ex. bridges) Alignment and location was based upon Halff Associates location map

Cross Section Geometry and Characteristics Combine with 2-foot contour data and a 30- meter DEM erasing overlapping data Generate a TIN (Triangular Irregular Network) creating a 3-D surface

Cross Section Geometry and Characteristics

Recut Cross Sections Using Geo-RAS Import Cross Sections Into HEC-RAS

Unsteady Flow Data Import data from HEC-DSS file format DSS file generated from LCRA Hydromet and gauge data Four gauges used to set flow and stage boundary conditions at downstream and all upstream locations Modeled heavy rain that occurred the first two weeks of November 2000

Unsteady Flow Data