Wormhole Island – “What’s the Best Shape for a Wormhole Culvert?”

A recent question was posted on the HEC-RAS blog regarding the optimal shape of the SA/2D Area Connection alignment for a wormhole culvert – in particular, whether a “Z” shape or “S” shape would be preferable. My apologies in advance for the drawn-out response, but I’ve had this question come up a number of times in class and […]

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Wormhole Culverts

This is one of the coolest workaround ideas for HEC-RAS that I’ve seen in a long time.  One of my joys in teaching HEC-RAS to professionals and students around the world is seeing the clever ways that people use and apply HEC-RAS.  Whether in a training class, giving technical support, or just simply over discussions […]

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Bridges in 2D Areas-Important Update!

***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 […]

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Lateral Structure Coefficients

Lateral structures can be used in HEC-RAS to transfer flow from a river/reach to a storage area, or to another river/reach.  With the coming release of HEC-RAS with 2D capabilities (estimated beta release January/February 2014), you’ll be able to hook a river/reach to a 2-D area using a lateral structure. Although its primary function in […]

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