Contents
What do you need to know about HEC-RAS?
Downloading this software indicates full acceptance of your responsibility in the use of this program. Please see the distribution policy for more details. These setup package include HEC-RAS 6.0, Documentation, and optionally the Example Projects.
When do I uninstall HEC-RAS 6.0?
If you previously installed any HEC-RAS 6.0, this setup package will automatically uninstall it before installing 6.0. This file contains all of the HEC-RAS example data sets.
Can you use HEC software outside of USACE?
Use is not restricted and individuals outside of USACE may use the program without charge. HEC will not provide user assistance or support for this software to non-USACE users. Downloading this software indicates full acceptance of your responsibility in the use of this program. Please see the distribution policy for more details.
Which is the htab parameter for starting elevation?
“HTAB parameter for starting elevation is lower than lowest elevation in the cross section main channel” Answer:New computation requirements within HEC-RAS Version 5.0 may necessitate slight alterations to the geometry files of older HEC-RAS models.
In order to start the tutorial, you need to be familiar with the HEC-RAS modelling system. A model in HEC-RAS is called project. A project consists of multiple files with multiple file extensions.
Where is the geometry data stored in HEC-RAS?
This is stored in a dedicated geometry file (.g0*). 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. These elements are now created in the RAS Mapper component of HEC-RAS.
Do you need ArcGIS for HEC-RAS 5.0.4?
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. However, we are using the same data, transformed into meters. IMPORTANT! In this tutorial, functionalities that have only been added to HEC-RAS in version 5.0.4 are used.
What to do if HEC RAS mapper does not work?
Remark: If the Terrain does not show, make sure both Terrains and Terrain are ticked. If still does not work, zoom in and zoom out. If still does not work, save (File→Save), close RAS Mapper and HEC-RAS and open all again.
How to use HEC-RAS for dam break studies?
This document provides information on how to use the HEC-RAS (River Analysis System) software when performing a dam break analysis. The document presents the unique hydraulic modeling aspects that are required, plus routing the inflow flood through a reservoir; estimating dam breach characteristics; and, downstream routing/modeling issues.
What is an ic.o01 file in HEC-RAS?
.IC. O01 is the Initial Conditions file. If submitting your final model to a client or a reviewer, you will likely only send the necessary input files. Sending output files are optional, but will allow the reviewer to avoid rerunning the model on their end.