Wet detention pond - Over bank protection (10-yr 24-hr) outlet configuration
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Design methodology | ||||
---|---|---|---|---|
1-yr 24-hr Instantaneous volume | 1-yr 24-hr routed (R124) | 1/2 Pre-development 2-yr 24-hr peak Instantaneous volume | 1/2 Pre-development 2-yr 24-hr peak routed (R224) | |
Weir length (ft) | 0.8 | 3.7 | 0.8 | 4.8 |
Weir elevation (ft) | 109.2 | 108.2 | 109.9 | 108.6 |
Surface area at weir elevation (ac) | 0.9 | 0.9 | 0.9 | 0.9 |
Peak discharge per design event (cfs)1 | 36.7 | 36.0 | 36.7 | 36.4 |
Peak water elevation per design event (ft) | 114.7 | 110.2 | 114.77 | 110.1 |
1Because the 10-year flow rate is designed to match the pre-development peak, the values in this row should be all less than or equal to 36.7 cfs.