Wow. That was scary! I was on my way to Concepcion to teach an HEC-RAS class for some students at the Universidad de Concepcion. Fortunately I decided to spend a few days in Santiago, before going to Conocepcion. I was on the 14th floor of the hotel, and had the fright of my life. The […]
Written by Chris Goodell, P.E., D. WRE | WEST ConsultantsCopyright © RASModel.com. 2010. All rights reserved.Though HEC-RAS has no function for computing wave heights, its a fairly simply procedure that can be done external to RAS and incorporated into your design, or breach assumptions. There are equations for wave heights and run up as a […]
Written by Chris Goodell, P.E., D. WRE | WEST ConsultantsCopyright © RASModel.com. 2010. All rights reserved.Not sure if this will be changed for the soon-to-be-released version 4.1, but for now, the option to drop flow from a lateral structure into multiple cross sections is a little awkward. First thing you do is specify that you […]
Just heard that HEC-RAS Version 4.1 is due out in about 1 week. I thought I’d take this opportunity to post the Version 4.1 Release Notes to give you all a sneak peak of what’s to come. Check the HEC website in the next week or so for the official software release. Hydrologic Engineering CenterRiver […]
Written by Chris Goodell, P.E., D. WRE | WEST ConsultantsCopyright © RASModel.com. 2010. All rights reserved.Here’s a classic case for interpolation of cross sections in a RAS model. Notice the drop in water surface to near critical depth at the grade break. Then, at the next cross section upstream of the break, RAS seems to […]
Written by Chris Goodell, P.E., D. WRE | WEST ConsultantsCopyright © RASModel.com. 2010. All rights reserved.I was recently emailed this question regarding steady flow versus unsteady flow results: “My question is fairly basic. I have heard from a couple of other engineers that when flood levels are generated with usteady flows that it is typical […]