An interesting and informative paper by Mr. Bruno Neves of Brazil on HEC-RAS dam breach modeling and determining the self rescue zone, as well as the timing for alerting residents of the self-rescue zone. The concept is tested using HEC-RAS with hypothetical 2D breach scenarios of the Santa Branca Dam in the Paraíba do Sul […]
HEC-RAS has the ability to simulate flow at hydraulic controls in a variety of ways. Bridges, culverts, inline structures, lateral structures, and SA/2D area connections can all act as hydraulic controls. Effectively, they break up the conservation equations used between cross sections in a 1D reach and/or cells in a 2D area with empirically derived […]
HEC-RAS 2D Modelling training in London! Less than one month away so we’re making the final call. This is your last opportunity to register for this class. This will be a fantastic opportunity to learn how to set up and run 2D and 1D/2D HEC-RAS models using the newly released HEC-RAS 5.0. I will be […]
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 […]