HEC-RAS Guides and Tutorials Current: Tutorials PDF Download PDF Download page Tutorials. Current page Include child pages All pages Tutorials Tutorials are intended to walk users through a task using detailed instructions with example data. Downloading Terrain Data Creating a RAS Terrain Terrain Modification 1D Sediment Modeling Tutorial Modeling a 2D Half Pipe with Non-Newtonian Fluid Expedited Debris Flow Tutorial Terms of Use Any use or reproduction of this material must be attributed to the US Army Corps of Engineers Hydrologic Engineering Center. ×