September 16, 2026
The No-Rise Surprise
Why Additional Conveyance Area Doesn’t Always Lower Water Surface
Lateral Structure flows into Multiple Cross Sections
Written by Chris Goodell, P.E., D. WRE | WEST Consultants
Copyright © 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.
Copyright © 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 want to drop your lateral flows into cross sections. Then set your upstream TW river station (the downstream one will be greyed out).
Then, go to the Weir/Embankment editor for your lateral structure. At the bottom left, you’ll see weir stationing reference. Select TW flow goes: “over multiple XS’s”. Then on the right hand side you’ll see a table for specifying weir stationing for your TW cross sections.
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