HEC-RAS 3D Modeling
HEC-RAS 3D Modeling
(OP)
What are the advantages of 3D modeling? We have a project where it was suggested that 3D modeling may be necessary since we are proposing to grade around some existing trees that will remain in place. They are currently along the bank but will end up in the middle of the river. Can't we make reasonable assumptions as to velocity/erosion and continue to use HEC-RAS as a 1D model? Why do we need 3D? It seems like overkill to me. Anybody use 3D on a regular basis?





RE: HEC-RAS 3D Modeling
I hope others with better knowledge of both HEC-RAS, HEC-Geo RAS, and AutoCad weigh in on this to explain it better than I have.
good luck
RE: HEC-RAS 3D Modeling
RE: HEC-RAS 3D Modeling
Have you worked with HEC-RAS or HEC-Geo RAS before ?
How precisely do you need to know velocities and is this precision really worth the extra time and expense needed to achieve it ?
I suspect the answer to the second question is NO, because the flows you will be using are probably no more accurate than plus or minus 50%.
good luck
RE: HEC-RAS 3D Modeling
http://www.flow3d.com/
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Looks quite expensive, and far beyond a HEC-RAS analysis. Heck, it looks you need a PHD in Fluid dynamics to do these studies.
RE: HEC-RAS 3D Modeling
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RE: HEC-RAS 3D Modeling
Thanks again! Gary