Pond design for multiple storm events to achieve the desired flows
Pond design for multiple storm events to achieve the desired flows
(OP)
I was trying to adjust the parameters (i.e. elevation, dimension, length, etc.) for outlet culverts, orifices, and weirs to achieve the desired flows at three rainfall events (i.e. 1-yr, 10-yr, and 100-yr). However, it is very difficult to adjust the parameters manually to meet one rainfall event, and even more difficult to meet all three rainfall events. I have been adjusting the parameters manually for the past two days and I was wondering if there is any optimization function in HydroCAD to do this?
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RE: Pond design for multiple storm events to achieve the desired flows
Peter Smart
HydroCAD Software
www.hydrocad.net
RE: Pond design for multiple storm events to achieve the desired flows
RE: Pond design for multiple storm events to achieve the desired flows
Throw your pond stage storage out for a moment. Draw in a vertical box that's got a lot of volume in it. Use one slot weir and nothing else, and vary the width of the slot until all your storms barely meet. Write down the 100 year storage in your concept pond. Compare that to your designed pond. If the volumes are significantly different, in particular if this concept pond is much larger in volume than the pond you have to work with, then you'll need to go back to the drawing board and figure out how to get more storage in your pond. You can't fit ten pounds of (flood storage) in a five pound bag.
Hydrology, Drainage Analysis, Flood Studies, and Complex Stormwater Litigation for Atlanta and the South East - http://www.campbellcivil.com