Export a HEC-RAS model from Civil3D. Part 3 of 3. Using the "Export to DEM" option of Civil3D, use SAGA and HEC-RAS Mapper to create a floodplain delineation...
HEC-RAS, Civil3D, Civil, 3D, floodplain, surface, Lidar, FEMA, AutoCAD, flood, GeoRAS, River, FIRM, SAGA, RAS, Mapper, DEM, FLT, ESRI