February 20, 2025
Full Momentum Episode 37: All Things Gates
Gates play a crucial role in hydraulic modeling, impacting water flow, flood control, and dam operations.
Having fun with HEC-RAS?
I’ve been seeing some cool applications of HEC-RAS from around the world lately. Here are some articles showing a few ways we’ve been putting HEC-RAS to use down under.
Making Middle Zealand
Did you know that the only thing keeping New Zealand’s two main islands from being split into three is a little 2-km wide piece of land just south of Auckland? What do you think would happen if you dug a ditch through this strip? Last time I drove across it, I asked myself that question…and then I let HEC-RAS tell me the answer! This article covers terrain manipulation and tidal boundary conditions in HEC-RAS with the construction of a canal that severs Northland from New Zealand’s North Island. The tides on either side of the island are out of phase with each other, so you get some really cool mixing with the alternating current. Have a read and give it a shot yourself!
Creating Rating Curves in HEC-RAS 2D Models
HEC-RAS does a great job providing you with rating curves for 1D models, but how about 2D? It takes a bit of additional effort, but this article walks you through the process of generating a rating curve from your existing 2D model. You may find – as we did in the example covered in the article – that the uncertainties in your rating curve are greater than you thought. Try it yourself by following along with this example, and see if you find yourself wanting to recalibrate your gauge!
Disappearing Terrain?
Do you get frustrated when your terrain disappears in HEC-RAS? Don’t fret, here are some simple workaroundsfor getting it back!
My HEC-RAS Wish List
Speaking of workarounds, the HEC Spring 2017 Newsletter included a preview of what’s new in Version 5.1 (see article on Page 20). They’ll be adding some handy new features, but here’s my HEC-RAS wish list that includes a compilation of suggestions gathered from hundreds of course attendees over the last year and a half since Version 5.0 was released. You may wish to submit your own on the Forum Page of the The RAS Solution.
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