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<center><font size=3>'''Table summarizing stormwater credits function. The table illustrates how to calculate water quality volume, channel protection and overbank storm volumes for different Better Site Design credits.'''</font size><br> | <center><font size=3>'''Table summarizing stormwater credits function. The table illustrates how to calculate water quality volume, channel protection and overbank storm volumes for different Better Site Design credits.'''</font size><br> | ||
− | Link to this Summary of stormwater credits function|table]].</center> | + | Link to this [[Summary of stormwater credits function|table]].</center> |
<table class="sortable"> | <table class="sortable"> |
Stormwater credit | Adjusted water quality volume | Channel protection and overbank storms |
---|---|---|
Natural area conservation | Subtract CA from site IC when computing Vwq | Adjust CN for CA to woods in good condition |
Site reforestation/prairie restoration | Subtract 1/2 RA from site IC when computing Vwq | Adjust CN for RA to woods or prairie in fair condition |
Streams and shoreline buffers | Subtract ADB from site IC when computing Vwq | Adjust CN for ADB to woods in good condition |
Surface impervious cover and disconnection | Subtract DIA from site IC when computing Vwq | Adjust CN for DIA to grass in good condition. Adjust Tc |
Rooftop disconnection | Subtract DRA from site IC when computing Vwq | Adjust CN for DIA to grass in good condition. Adjust Tc |
Grass channels | Subtract GA from site IC when computing Vwq | Adjust Tc |
Note: Unless otherwise noted, all units below are measured in acres