HEC-RAS 2D en España - HEC-RAS 2D in Spain

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.

For my fellow HEC-RAS Users who are in or around Spain, my colleague Marty Teal will be teaching our HEC-RAS 5.0 2D Course in two locations in October 2016.  Oct 19-21 in Barcelona and Oct 24-26 in Seville.

Wish I could be there, but Marty speaks much better Spanish then I do. :-)
For more information, click here.




And for you English-speaking HEC-RAS users, there is still space for more attendees at the London class in July.  But don't wait too long to register, there will be a limit.

Bridges in 2D Areas-Important Update!

Written by Christopher Goodell, P.E., D.WRE  |  WEST Consultants 
Copyright © The RAS Solution 2016.  All rights reserved. 

***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 strictly as a means to include a bridge in a 2D area to gage its effect on the overall resulting flood inundation.  Meeting FHWA standards for bridge modeling requires much more information than these options will provide you.  


Second, Mark Forest posted a couple of very good comments that I would like to share. Please read his comments at the end of this post.


There have been a lot of requests for examples of how to model bridges in 2D areas.  First, let me state up front that in the current version (5.0.1) there is no direct way to put a bridge in a 2D area, like you would in a 1D reach.  That means, that we currently don’t have a way to use low flow bridge modeling approaches like Energy, Momentum, Yarnell, and WSPRO.  Likewise, you can’t use the high flow approaches (Energy, Pressure/Weir).  Hopefully this will be added to a future version.  

That being said, I’ll present three options for simulating bridges in 2D areas.  

To demonstrate these options, I used a dam breach model adapted from HEC’s Bald Eagle Creek data set.  The animation is included at the end of this article. 

HEC-RAS 2D Modelling Training in London July 19-21, 2016

HEC-RAS 2D Modelling training in London!   

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 hosting this course in London England on July 19-21, 2016.  Register now!  Space is limited!

Please go here to register for the class.
  

If you have any questions, or to express interest in the class, please email Chris Goodell at cgoodell@westconsultants.com

This course will take place in  London,  19-21 July, 2016 and will be taught by Mr. Chris Goodell of WEST Consultants and The RAS Solution.

The course will be held at the Imparando conference/training facilities at - 56 Commercial Road, Aldgate East - E11LP in downtown London. 

Please register for the class using the following form:  
https://drive.google.com/file/d/0B0bpiyLiUeRXSVgtM0RpaUJXWEU/view?usp=sharing.

Since the beta version of HEC-RAS 5.0 was released in 2014 Chris Goodell has given the HEC-RAS 2D Modeling class more than 15 times throughout the United States and around the world in places like Pretoria, Milan, and Melbourne. 

Benchmarking of the HEC-RAS Two-Dimensional Hydraulic Modeling Capabilities

HEC has released a new HEC Research Document called “Benchmarking of the HEC-RAS Two-Dimensional Hydraulic Modeling Capabilities”.  This research document summarizes how the Hydrologic Engineering Center's (HEC) River Analysis System (HEC-RAS) software performed in the two-dimensional (2D) modeling benchmark tests developed by the United Kingdom's (UK) Joint Defra (Department for Environmental Food and Rural Affairs) Environment Agency.  These Benchmarking Tests are widely used to compare 2D models over a wide range of flow situations.

Here is the link to the document on the HEC-RAS web page:

  

Please foreword this post to anyone you know that would be interested in this document.

HEC-RAS Version 5.0.1 is now Available!

A new "bug-fix" version of HEC-RAS has just been released (5.0.1).  A few computational bugs were identified since the release of 5.0, which were severe enough that HEC needed to fix them promptly.

You can download the latest version from the HEC web page:


http://www.hec.usace.army.mil/software/hec-ras/



The following is a list of bugs that were found in version 5.0 and fixed for version 5.0.1:

1. Unsteady Flow with Pumps: A pumping station that is connected "From" a storage area had a bug that could generate an "access violation" error.

2. Unsteady flow with rating curves at structures: The rating curves for: inline structure outlet rating curve, lateral structure outlet rating curve, and user defined gate rating curves (both inline and lateral) have been changed so that unsteady will no longer extrapolate past the top or bottom of the curve. A warning will be generated the first time this happens.

3. Unsteady flow with an SA/2D Hydraulic Conn between two 2D areas: There was a bug when a SA/2D connector has a 2D area on the upstream side. This bug would sometimes show up as an "access violation" error.

4. Steady Flow Analysis (Encroachments at Bridges): There was a bug when type 1 encroachments were specified immediately adjacent to a bridge opening. The encroachment was being set to the opening. The left encroachment was set to the left side of the bridge opening and the right encroachment was being set to the right edge of the opening.

5. Unsteady flow with 2D areas/Internal Hydraulic connector: For a hydraulic connector inside of a 2D area, the DSS output for headwater and tailwater had a bug. The reported values were "one cell" away from the intended values. For a connection that was entirely inside of a single cell, this resulted in a reported water surface of "0.0". This was only a reporting issue.

6. 1D Velocity plotting in HEC-RAS Mapper for metric data sets: 1D HEC-RAS Mapper maximum velocity plot was wrong for SI data sets.

7. Unsteady flow Lateral Structure connected to a 2D flow area: For a lateral structure connected between a 1D river and a 2D area, the lateral structure was pulling the water out of the river at the wrong cross section location. The flow was being re

moved from the 1D river upstream of the location it should have been removing it from.

8. User Interface – Right Bank of Main channel: If you had a cross section with a vertical wall at the right bank of the main channel, the interface was displaying the main channel bank station at the bottom of the vertical wall. The computations were correct, this was just a visual problem in the interface.

Getting Profile Output in a 2D Area

Written by Christopher Goodell, P.E., D.WRE  |  WEST Consultants 
Copyright © The RAS Solution 2016.  All rights reserved. 

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 area.  In the final release of Version5.0, you may have noticed in the bottom left-hand corner of RASMapper, there is a very unassuming tab called “Profiles Lines”. 

Profile Lines are another way of extracting linear data from a 2D area, only these are extracted longitudinally, like a profile plot.  Here’s how it works:

HEC-RAS 2D Training Course London, U.K. July 19-21, 2016

HEC-RAS 2D Modelling training in London!   

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 hosting this course in London England on July 19-21, 2016.  Don't wait to register!  This class is expected to fill up quickly.  

Please go here to register for the class.  

This course will take place in  London,  19-21 July, 2016 and will be taught by Mr. Chris Goodell of WEST Consultants and The RAS Solution.

The course will be held at the Imparando conference/training facilities at - 56 Commercial Road, Aldgate East - E11LP in downtown London. 

Please register for the class using the following form:  
https://drive.google.com/file/d/0B0bpiyLiUeRXSVgtM0RpaUJXWEU/view?usp=sharing.