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  1. DenverJ

    Hydrologic Model for solar farms

    I wanted to thank everyone for your replies. We recently had a meeting with PA DEP at the site. Their main concern from a stormwater standpoint was not with the solar arrays themselves but any concrete for footers and any stone under the panels. Our client stated that there shouldn't be a need...
  2. DenverJ

    Hydrologic Model for solar farms

    I'm looking for any guidance/advice for preparing a stormwater model for a 200+ acre solar farm. We're at the very early stages of this project but I would like to get some input on how I should approach the project. The site is currently in agricultural use with rolling crop fields and a stream...
  3. DenverJ

    modeling stormwater flow through a stone trench

    Thanks for the comments guys. psmart, your recommendation for an equivalent cross-section seems to be my best option for modeling. cvg, I'm not overly concerned with capacity as even my longest stretch of road generates less than 1 cfs and there is no upslope runoff which would reach the...
  4. DenverJ

    modeling stormwater flow through a stone trench

    In this case, this trench is intended to be a conveyance feature not a pond. It is intended to replace a roadside ditch in an area where there isn't sufficient room to grade a ditch. The idea is to have trenches 2' wide and 1.5' deep running along the side of the road to daylight just short of...
  5. DenverJ

    modeling stormwater flow through a stone trench

    I was hoping for some guidance on how to model stormwater flow through a stone trench in HydroCAD. What I have is a gravel access road which was constructed across the end of a field without a roadside ditch. The property owner is complaining about flows from the road causing erosion in his...
  6. DenverJ

    stormwater flow through a gravel berm

    For modelling purposes, the assumption in this case, due to Pennsylvania DEP's infinite wisdom, is that the surface of the gravel pad is impervious. The only outlet would be through the gravel berms along the perimeter, which would be constructed with a clean, well sorted gravel.
  7. DenverJ

    stormwater flow through a gravel berm

    High all. I am trying to figure out how to model the following: I have a 400 foot square gravel pad with a level surface. There is a gravel berm running along the fill slope sides creating a "pond". The berm is approximately 18" high and 4 to 6 feet wide at the base. What I am trying to do is...
  8. DenverJ

    time of concentration

    cvg I guess the answer is that the program defaults to two decimals and we've never really looked into whether that can be changed. Looking last night I saw how I can do that. Now I just need to talk my head engineer into letting me do it.
  9. DenverJ

    time of concentration

    Thanks Twinkie. I figured that might be the case. I am designing a well pad with an access road. I have one watershed in the pre-construction condition and I am splitting the watershed in two for the post; one for the pad which is being treated by a BMP and one which contains the roadway with...
  10. DenverJ

    time of concentration

    I wanted to know if this is an acceptable practice. I have a small watershed (1.4 Ac) with a proposed gravel road in the middle. I am using a ditch turnout/level spreader to divert runoff from the roadside ditch to a forested area. I would like to run my Tc for the watershed from an upslope...

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