HEC-RAS 3.0 Input Data and Demo

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

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