In an earlier blog post, we discussed some details regarding modeling overflow gates in HEC-RAS. These gates are typically used in irrigation canals. This blog post generated many interesting questions and comments regarding modeling irrigation canals in general using HEC-RAS. Thus, we felt it might be interesting to address some of these questions in a […]
Para los compañeros usuarios de HEC-RAS viviendo dentro o cerca de España, mi colega Marty Teal estará dictando dos cursos de modelación bidimensional con HEC-RAS5.0 allá en Octubre: en Barcelona el 19-21 y en Sevilla el 24-26. Me gustaría estar allá pero Marty habla español mucho mejor que yo 🙂 Vaya aquí para más información. […]
***Update: I received a few very important comments about this post that I want to share. First, and this is very important: These methods are not meant to be used to do any kind of detailed bridge design or bridge scour analysis (contraction, abutment, or pier scour). The methods I present in this post are […]
Back in September 2015, I wrote an article on how to extractflow data from a transect in a 2D area. This was a round-about way of getting flow flux data out of RAS Mapper. Back then the beta version of HEC-RAS 5.0 was somewhat limited in the ways data could be extracted from a 2D […]
Now that the official release of HEC-RAS 5.0 is out with 2D capabilities, I’m getting a lot of questions about whether 1D or 2D (or 1D/2D combined) is the best way to set up a specific model. The answer is very simple. Like everything else…It depends! Fortunately, there are some guidelines. 1. The general […]
A nice replication of the Mamore Flood of 2014 in Bolivia using HEC-RAS Version 5 courtesy of Vladimir Moya.
The new and improved RAS Mapper interface in HEC-RAS 5.0 makes managing and exporting model results like an inundation extents shapefile or a depth grid for use outside of HEC-RAS/RAS Mapper easy. The process (which is described in detail in Chapter 5 of the HEC-RAS 5.0 2D Modeling User’s Manual) requires the user to add […]
I’ll be teaching our very popular 2D HEC-RAS course in my home town of Portland Oregon, just in time to feature the official release of HEC-RAS 5.0. If you live in the area, or you’ve always wanted to figure out why everyone is talking about Portland (and HEC-RAS 5.0!), read on for more information […]
The wait is over! Finally the official release of HEC-RAS Version 5.0 is here. You can download it from the HEC website at http://www.hec.usace.army.mil/software/hec-ras/ If the download from the HEC website is slow, you can also download it from here: https://drive.google.com/file/d/0B0bpiyLiUeRXTy1pdUNralMzZ1U/view?usp=sharing (207 MB, Installation package without example problems) https://drive.google.com/file/d/0B0bpiyLiUeRXNGllMlE5V1dmQmM/view?usp=sharing (538 MB, Installation package with example problems) This new […]
The 2D HEC-RAS class is a GO! Who wants some HEC-RAS 2D Modelling training? This will be a fantastic opportunity to learn how to set up and run 2D and 1D/2D HEC-RAS models. Mr. Krey Price and I will be hosting this course in Melbourne, Australia on April 5, 6, and 7th. Please go here for more details […]
We often have to deal with very large models covering hundreds of river miles. The terrain data associated with these models can be equally massive, which can cause memory/processor issues when trying to delineate inundation maps. This post is not concerned with pre-processing our model geometry. Instead, we have a completed model with results we […]
You can have a 2D full momentum model without errors if: Your cell size and computation interval is appropriate Everything is moving very slowly Stages are high Slopes are shallow N values are high Discharge doesn’t change too suddenly It’s a 2D only model (i.e. no connections to 1D) You are a skilled HEC-RAS modeler […]