100 yr flood in HEC_RAS
100 yr flood in HEC_RAS
(OP)
I am running HEC_RAS for the proposed culvert.The 100 yr flow seems to jump up at the culvert. Is this because of the ineffective flow area that I set.
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RE: 100 yr flood in HEC_RAS
RE: 100 yr flood in HEC_RAS
RE: 100 yr flood in HEC_RAS
As for including the rail, I don't know, but if the goal is to prevent overtopping, use the lowest elevation part to which point some flooding is tolerable.
RE: 100 yr flood in HEC_RAS
RE: 100 yr flood in HEC_RAS
RE: 100 yr flood in HEC_RAS
RE: 100 yr flood in HEC_RAS
Start a new thread.
RE: 100 yr flood in HEC_RAS
RE: 100 yr flood in HEC_RAS
RE: 100 yr flood in HEC_RAS
RE: 100 yr flood in HEC_RAS
RE: 100 yr flood in HEC_RAS
You may need to download and reinstall RAS. Save the geometry, plan, and other files somewhere safe before you reload the program.
RE: 100 yr flood in HEC_RAS
RE: 100 yr flood in HEC_RAS
I always set the ineffective flow areas first and then skew the bridge and the cross sections afterward. This takes the ineffective flow areas into account when skewing the cross sections. Just remember that you have to tell it to skew the cross sections as well as the bridge.
RE: 100 yr flood in HEC_RAS
RE: 100 yr flood in HEC_RAS
When you generate the report, you can tell RAS not to include geometric data. It's either no geometric data, or all of it.
RE: 100 yr flood in HEC_RAS
Any idea, please.
RE: 100 yr flood in HEC_RAS
Why was your ineffective area in the channel? If the channel is actively flowing, then it cannot be ineffective. Sounds like you need to un-skew your culvert and bounding cross sections, set new ineffective area boundaries, and skew the culvert and cross sections again. And don't worry about what the WSE does until after you get the geometry modeled correctly. The culvert may be causing an increase in WSE, which would indicate it may be too small.