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→To calculate the require facility area or footprint where the depth is constrained (1D drainage)
==To calculate the require facility area or footprint where the depth is constrained (1D drainage)==
==To calculate the require facility area or footprint where the depth is constrained (1D drainage)==
In many locations throughout Ontario, there may be limited depth of soil available into which stormwater may be infiltrated. In this case the required storage needs to be distributed more widely across the landscape. The overall are of BMP required can be calculated:
In many locations throughout Ontario, there may be limited depth of soil available into which stormwater may be infiltrated. In this case the required storage needs to be distributed more widely across the landscape. The area of the storage reservoir, A<sub>r</sub> can be calculated:
<math>Ap=\frac{iDAi}{ndr+f'D}</math>
<math>Ar=\frac{iDAi}{ndr+f'D}</math>
==Time for drainage of surface ponded water==
==Time for drainage of surface ponded water==