Check your local regulations, which should have specifics. But beware, this is generally a complex task that shouldn't be attempted without prior experience.
If you want further suggestions on a text, try posting your question in the general Storm/Flood Egineering forum.
How do you model 3 detention basins in series?
I want to simulate inflows from a wartershed into the first basin, allow some infiltration to occur, use a weir to route the excess flows 100 ft in a wash to the next detention pond, route the excess flows into a wash to the final detention pond, and release the final suppressed peak with a weir to the historic channel. The detention basins will serve as parks when not in use. In Arizona, flooding usually occurs only in the Summer.
