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CALCULATING AN EMERGENY SPILLWAY WEIR

thread162-37376

CALCULATING AN EMERGENY SPILLWAY WEIR

CALCULATING AN EMERGENY SPILLWAY WEIR

(OP)
HOW DO I CALCULATE A SPILLWAY (WEIR) TO RELEASE A CERTAIN AMOUNT OF CFS?

RE: CALCULATING AN EMERGENY SPILLWAY WEIR

the weir equation (simple version)is:
Q=C*L*H^3/2

Q is flow, L is length, H is head, C is weir coefficient
for broad crested concrete weirs (eg. roadways)
C is about 2.6

Equations to specific weir types and shapes can
easily be found in hydraulic books or on the net.

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