Laserfiche WebLink
beak <br />l0yr -- 24hr = 0.66 inches A = 4.21 acres <br />• = 2.78 acre inch <br />= 0.23 acre feet <br />25yr -- 24hr = 0.81 inches <br />5. Determine peak discharge of runoff CPf88 (pp18 - FIG. 5-lA, SCS} <br />25yr -- 24hr = 9.0 cfs/inch of runoff <br />< 0.81 inches <br />= 7.3 cfs <br />• <br />Pond Design from 4lSC Description <br />1. Pond volume <br />Principal Spillway <br />Emergency Spillway <br />2. Peak flow <br />1 5 ~a-s <br />Q= A n R 5 <br />= 0.366 acre ft <br />= 0.463 acre ft <br />i <br />f aft lft <br />_ (lft * 3ft)(0.017)(lft5ft3ft )3 (0,015)2 <br />_ (aft )(88.235)(0.711)(0.122) <br />= 23.1 cfs <br />Summary <br />1. Pond volume <br />Needs 0.23 acre ft water volume <br />Needs 0.14 acre ft = 0.035 acre ft/acre * 4.83 acres <br />Needs 0.37 acre ft total volume <br />• Designed for 0.37 acre ft <br />