Difference between revisions of "Wet detention pond - Extreme flood (10-yr 24-hr) outlet configuration"
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| − | + | <font size=3>'''Wet detention pond - Extreme flood (10-yr 24-hr) outlet configuration'''</font size><br> | |
| − | Link to this [[Wet detention pond - Extreme flood (10-yr 24-hr) outlet configuration|table]] | + | Link to this [[Wet detention pond - Extreme flood (10-yr 24-hr) outlet configuration|table]] |
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| − | <th>1-yr 24-hr | + | <th>1-yr 24-hr Instantaneous volume</th> |
<th>1-yr 24-hr routed (R124)</th> | <th>1-yr 24-hr routed (R124)</th> | ||
| − | <th>1/2 Pre-development 2-yr 24-hr peak | + | <th>1/2 Pre-development 2-yr 24-hr peak Instantaneous volume)</th> |
<th>1/2 Pre-development 2-yr 24-hr peak routed (R224)</th> | <th>1/2 Pre-development 2-yr 24-hr peak routed (R224)</th> | ||
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| − | < | + | <font size=1><sup>1</sup>Note that the Instantaneous volume method requires twice the surface area (4 percent vs 2 percent of drainage area) and about 6 more feet of storage depth than the routed method for this design event. This is the result of introducing the entire event volume at once versus the more realistic routing of inflow and outflow.</font size> |
| − | [[ | + | <noinclude> |
| + | [[Category:Level 3 - General information, reference, tables, images, and archives/Tables/Ponds and wetlands (constructed)]] | ||
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Latest revision as of 13:37, 3 August 2022
Wet detention pond - Extreme flood (10-yr 24-hr) outlet configuration
Link to this table
| 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) | 3.0 | 3.9 | 3.1 | 4.6 |
| Weir elevation (ft) | 114.72 | 110.2 | 114.7 | 110.1 |
| Surface area at weir elevation (ac) | 1.2 | 0.9 | 1.2 | 0.9 |
| Peak discharge per design event (cfs)1 | 81.8 | 81.5 | 81.8 | 81.4 |
| Peak water elevation per design event (ft) | 118.4 | 112.0 | 118.4 | 111.8 |
| Designed surface area at HWL (ac) | 2.01 | 1.0 | 2.0 | 1.0 |
1Note that the Instantaneous volume method requires twice the surface area (4 percent vs 2 percent of drainage area) and about 6 more feet of storage depth than the routed method for this design event. This is the result of introducing the entire event volume at once versus the more realistic routing of inflow and outflow.
This page was last edited on 3 August 2022, at 13:37.