Weirs
Weirs
(OP)
Does anyone know of a reference which discusses the use of weirs in outlet control structures for detention basins? I am looking for a practical explanation of when to use different types of weirs, dos and don'ts, etc.
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RE: Weirs
RE: Weirs
RE: Weirs
Uncivilized hit it dead-on regarding when to use weirs vs orifices. You cannot obtain precise low-flow control with a weir, but can accomodate high flow with low head.
Also note that an overflow riser operates as a weir under low stage conditions, but starts to operate as an orifice as the stage increases.
Check your DOT or Drainage Utility's manuals for guidance first, if what you need is not in there consider checking out Chow.
RE: Weirs
RE: Weirs