Step 37: Go to the Schematic tab and drag and drop a (w/o underdrain)” icon and a “Bioretention stormwater pond” icon into the Window”. “Constructed “Schematic Step 38: Open the BMP properties for the bioretention by right clicking on the basin “Bioretention (w/o underdrain)” icon and selecting BMP properties”, or by double clicking on the “Edit “Bioretention basin (w/o underdrain)” icon. Step 39: Determine the watershed characteristic for the bioretention basin. The watershed parameters for the bioretention basin in the clumping scenario include the entire watershed areas for all four bioretention basins from the individual scenario. The watershed information comprises a 3.05 acre site with 0.64 acres of impervious area and 2.41 acres of Managed turf area in A soils. The Managed turf area includes a 0.055 acre bioretention basin (the sum of the four areas for the basins used in the first scenario). Route the BMP to the constructed stormwater pond and fill in the BMP specific watershed information. Step 40: Enter in the BMP design parameters for the bioretention basin into the parameters” tab. “BMP The following inputs are required for this BMP. Overflow surface area, which is 2400 square feet Bottom surface area, which is 1850 square feet Overflow which is 1.4 feet Underlying soil Hydrologic Soil Group, which is 5 SP (HSG A, 0.8 in/hr) – Required drawdown time, which is 48 hours Step 41: Click on Summary” tab to view results for this BMP. “BMP
Step 37: Go to the Schematic tab and drag and drop a “Bioretention (w/o underdrain)” icon and a “Constructed stormwater pond” icon into the “Schematic Window”. Step 38: Open the BMP properties for the bioretention by right clicking on the “Bioretention basin (w/o underdrain)” icon and selecting “Edit BMP properties”, or by double clicking on the “Bioretention basin (w/o underdrain)” icon. Step 39: Determine the watershed characteristic for the bioretention basin. The watershed parameters for the bioretention basin in the clumping scenario include the entire watershed areas for all four bioretention basins from the individual scenario. The watershed information comprises a 3.05 acre site with 0.64 acres of impervious area and 2.41 acres of Managed turf area in A soils. The Managed turf area includes a 0.055 acre bioretention basin (the sum of the four areas for the basins used in the first scenario). Route the BMP to the constructed stormwater pond and fill in the BMP specific watershed information. Step 40: Enter in the BMP design parameters for the bioretention basin into the “BMP parameters” tab. The following inputs are required for this BMP. Overflow surface area, which is 2400 square feet Bottom surface area, which is 1850 square feet Overflow which is 1.4 feet Underlying soil – Hydrologic Soil Group, which is 5 SP (HSG A, 0.8 in/hr) Required drawdown time, which is 48 hours Step 41: Click on “BMP Summary” tab to view results for this BMP.
16_-_Individual_vs_Clumping_example.docx