Friday, April 22, 2016

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:

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.

Wednesday, April 20, 2016

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:

Friday, April 1, 2016

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

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.  

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: