11/7/2022 0 Comments Hec ras etc=> In XS River Stations - Units select Meters => In Projection - ESRI Projection File (*.prj), add projection file ClipPoly from Baxter_flood \Projection_Data\ => Select Tools→Set Projection for Project… The coordinate system defined by the projection file needs to be a projected coordinate system. These include specifying a coordinate system. Before geometry generation, it is necessary to create the basic conditions to develop geospatial features. RAS Mapper is a dedicated interface for visualization and processing of geospatial data. Please refer to the manual for further information or for a description of tools outside the scope of this tutorial. The manual has also been adapted using an exercise by V. Merwade, Purdue Univ. The following steps are based on Chapter 3 of the manual provided by HEC-RAS (accessible through Help →Users Manual Supplement). These elements are now created in the RAS Mapper component of HEC-RAS. To create all necessary geometric data for HEC-RAS geometry file, before version 5.0.4, it was necessary to perform pre-processing of available data using HEC-GeoRAS plugin in ArcGIS. This is stored in a dedicated geometry file (.g0*). The geometry in HEC-RAS contains information on cross-sections, hydraulic structures, river banks, roughness coefficient, etc. Output (used to create graphs and tables) A project consists of multiple files with multiple file extensions. In order to start the tutorial, you need to be familiar with the HEC-RAS modelling system.Ī model in HEC-RAS is called project. Therefore, it is only possible to follow this tutorial using that version. IMPORTANT! In this tutorial, functionalities that have only been added to HEC-RAS in version 5.0.4 are used. However, we are using the same data, transformed into meters. With the introduction of HEC-RAS 5.0.4, there is no need for using ArcGIS and HEC-GeoRAS, therefore the steps in this tutorial are significantly different. Remark: The link above also provides a step-by-step procedure on flood inundation mapping using HEC-GeoRAS and ArcGIS. Baxter river data is based on the materials of Purdue University that are available at: The river for which the tutorial is carried out is called Baxter and located in the United States of America.
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