HEC-RAS Guides and Tutorials Current: Guides PDF Download PDF Download page Guides. Current page Include child pages All pages Guides Guides are intended to be short overviews of how to do something. Creating an Combined 1D/2D Model Export Channel Data for Terrain Re-projecting Model Geometry Creating a Terrain Dataset to Model a Flume Experiment Modeling Steep Reaches GDAL Projection File Warning Skip SRS Translation For Terrain Imports Use Refinement Regions For Aligning Cell Faces with Channels RUG Terms of Use Any use or reproduction of this material must be attributed to the US Army Corps of Engineers Hydrologic Engineering Center. ×