Stormwater Quality Design Manual (May 2007) - City of Sacramento ...

Design Data Summary SheetConstructed Wetland BasinTable CWB-4. Design Data Summary Sheet for Constructed Wetland Basin (Page 1 of 2)Designer:Company:Project:Location:Date:1. Design Water Quality Volumea. Tributary drainage areab. Water Quality VolumeArea = ft 2WQV = ft 32. Wetland Basin Minimum Permanent Pool Volume(Vol pp ≥ 0.75 x WQV)Vol pp ≥acre-ft3. Wetland Basin Depths and Water Surface Areasa. Permanent pool volume (Vol pp )Average depth of permanent pool (D avg )Water surface area of permanent pool (A pp )Water surface elevation of permanent pool (WS Elev pp )b. ForebayDepth range = minimum 4 ftVolume range = 5-10 % of WQVWater surface area range = 5-10 % of Appc. Open Water ZoneDepth Range = minimum 4 ftWater surface area range = 30-50% of Appd. Wetland Zones with Emergent VegetationDepth Range = 6-12 inchesWater surface area range = 50-70% of Appe. Outlet PoolDepth Range = 3 ft minimumWater surface area range = 5-10% of AppACTUAL DESIGNVol pp =acre-ftD avg =ftA pp = ft 2WS Elev pp =ftDepth =Volume =WS Area =Depth =ftWS Area = ft 2Depth =ftWS Area = ft 2Depth =ftWS Area = ft 2ftacre-ftft24. Surcharge Depth of WQV and Max WS Elevationa. Maximum water surface area with WQV (A WQV )b. Surcharge depth of WQV (D WQV ≤ 2.0 ft)Final D WQV = WQV/((A WQV + A pp )/2)c. Maximum water surface elevation with WQV (WS Elev WQV )A WQV =D WQV =WS Elev WQV =ft2ft.ft5. Determine Maximum Month Inflow RequirementQ inflow = - Q E-P + Q seepage + Q ET Q E-P = acre-ft/moQ seepage =acre-ft/moQ ET =acre-ft/moQ inflow =acre-ft/moStormwater Quality Design Manual for the Sacramento and South Placer RegionsMay 2007CWB-9