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 Assessment of Stormwater Best Management Practices
Level 2 - Capacity Testing
An assessment method used to determine the permeability (hydraulic conductivity and total infiltration flow rate in volume per time) or the sediment retention capacity (remaining sediment storage volume) of the stormwater BMP from a number of spatially distributed, relatively rapid, and simple point measurements. Below are some examples of capacity testing for the permeability of a rain garden.
Permeability measurement with a Modified Philip-Dunne permeameter, Ramsey-Washington Metro Watershed District offices in Little Canada, MN (Photo by Brooke Asleson)
Permeability measurements with a double ring infiltrometer, U of MN - Duluth, MN (Photo by Rebecca Nestingen)
Modified Philip-Dunne permeameter Calculation Template
Instructions, pdf, 10 KB
Modified PD Calculation Template, Excel, 47 KB
Visual Curve, Excel, 15 KB
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