![hec ras uniform flow with cross sections hec ras uniform flow with cross sections](https://www.caee.utexas.edu/prof/maidment/grad/tate/research/RASExercise/webfiles/output1.gif)
=> Zoom-in to the most upstream part of the Baxter River to see the main channel Centerlines are aligned in the direction of flow. Consequently, there are three reaches that are defining the river network: upper Baxter River (Upper reach), lower Baxter River (Lower reach) and Tule Creek Tributary as shown in the Figure below.Įach centerline is created/digitized separately, approximately following the centre of the river, from upstream to downstream. River centerline is used to determine the river network of a HEC-RAS model. Baxter River is flowing from East to West and receives water on the right bank from Tule Creek.
#Hec ras uniform flow with cross sections update#
=> Right-click Baxter and select Auto Update Geometry => Right-click Geometries and select Add New Geometry In this step, an empty geometry is created. Therefore, we will build a georeferenced 1D geometry based on a Terrain dataset. In this tutorial we assume that the flow in the river is mainly one-dimensional. If still does not work, save (File→Save), close RAS Mapper and HEC-RAS and open all again. If still does not work, zoom in and zoom out. Remark: If the Terrain does not show, make sure both Terrains and Terrain are ticked. RAS Mapper view after adding terrain data => Add raster file from Baxter_flood \Terrain_Data\ => 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.
#Hec ras uniform flow with cross sections manual#
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)
![hec ras uniform flow with cross sections hec ras uniform flow with cross sections](https://slidetodoc.com/presentation_image_h/98c9d7dba790a7373b422f0009cb9573/image-71.jpg)
![hec ras uniform flow with cross sections hec ras uniform flow with cross sections](https://www.hec.usace.army.mil/confluence/rasdocs/rasum/files/latest/46008566/46008569/1/1610590770317/worddave27f7aad306ab2b2b11328b858ca4126.png)
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:
![hec ras uniform flow with cross sections hec ras uniform flow with cross sections](http://2.bp.blogspot.com/-CpVBdF5yHIA/XCpMrxwYH4I/AAAAAAAAGbA/En9vJN2Qyg88KEkUYPasHB6wJ3jHOi9rwCEwYBhgL/s1600/Figure4.png)
The river for which the tutorial is carried out is called Baxter and located in the United States of America.