Thanks Robert, While I am not new to water quality and runoff models, I was unsure which was more suitable for dam break analysis. I was offered to do this by a client, but since it is permit related, and I do not maintain insurance for these sorts of projects, I am passing on it.
Oh, to sum up...
Its a permit, and my obj is to get the peak flows at two road crossings downstream of an earthen dam. Is this a watershed runoff model (i.e. HEC-HMS)? If so, how do you account for the stored water volume?
(thanks cvg for the read - good info)
That you Robert, very helpful.
I do use ArcHydro, so are you saying I should delineate the drainage area using ArcHydro. I don't have HydroCad, so is there another tool or paper to use for calculating the CN for 1/2 PMP?
Thanks!
Thanks all.
I have a small earthen dam, where 1/4 mile downstream is a road culvert then an interstate culvert.
I need to calculate peak flow at both culverts upon dam breach (will do sunny day, 10/25/100 yr storms)
So I shouldn't create a drainage profile in HEC-RASGeo for this?
Thanks...
I need to calculate the peak flow upon dam breach, not watershed runoff. Is that still something other than HEC-RAS?
Chris Erichsen
GeoIntel GIS
WWW.GEOINTEL.COM
New to HEC-RAS but need to find peak flows just downstream of a small earthen dam, where the downstream reach passes under two roads.
I have HEC-GeoRAS and HEC-RAS.
Any tips or links to papers that can walk me thru this?
TANKS!!
Chris Erichsen
GeoIntel GIS
WWW.GEOINTEL.COM
I use ESRI ArcMap, which I think is far beyond the capabilities you need, though you can likely buy an older license of ArcView 3.x on ebay for cheap. You would also need the Spatial Analyst extension for it. Find as package. This has some of the best point to contour to TIN surface capabilities...
