RAS2FIM - HEC-RAS Models to Flood Inundation Maps

This is an introduction and overview to using RAS2FIM. Starting with geospatially attributed one-dimensional HEC-RAS floodplain models, these scripts are used to create a library of flood depth inundation rasters for a range of storm water discharges (flow). HEC-RAS models are cut to roughly match the limits of the National Water Model's (NWM) stream designations (hydrofabric).

For each matching NWM stream, a synthetic rating curve is created based on 'reach averaged' flood depths as determined from the HEC-RAS simulations. The intent it to create a library of flood depth inundation grids with a corresponding rating curve that can be paired with the National Water Model's discharges determination and forecasting to create real-time and predictive floodplain mapping from a detailed HEC-RAS 1-D model.