Line 26: |
Line 26: |
| *''A<sub>c</sub>'' = Catchment area in m<sup>2</sup>}} | | *''A<sub>c</sub>'' = Catchment area in m<sup>2</sup>}} |
| |} | | |} |
| | | ---- |
| | | {| class="wikitable style="border: none; background: none;" |
| | | |To calculate the required depth, where the area of the facility is constrained: |
| | <math>d=\frac{D\left[Ri-q'\right]}{V_{R}}</math> |
| | |To calculate the require facility area or footprint where the depth is constrained: |
| | <math>A_{p}=\frac{IiD}{V_{R}d+\left ( \frac{q}{SCF} \right )D}</math> |
| | |} |
| | {{Plainlist|1=Where: |
| | *''D'' = Duration of design storm in hrs |
| | *''i'' = Intensity of design storm in mm/hr |
| | *''q''' = Infiltration coefficient in mm/hr (accounting for SCF) |
| | *''SCF'' = Safety correction factor |
| | *''V<sub>R</sub>'' = Void ratio (porosity), as measured (or default to 0.35 for all aggregates)* |
| | *''R'' = Ratio of catchment area (''A<sub>c</sub>'') to BMP footprint area (A<sub>p</sub>) syn. I/P ratio. |
| | *''A<sub>p</sub>'' = Area of the infiltration practice in m<sup>2</sup> |
| | *''A<sub>c</sub>'' = Catchment area in m<sup>2</sup> |
| | *''d'' = Depth of infiltration practice in m.}} |
|
| |
|
|
| |
|
Line 34: |
Line 48: |
| They may be easily applied for any shape and size of infiltration facility, in which the reservoir storage is mostly in an aggregate. | | They may be easily applied for any shape and size of infiltration facility, in which the reservoir storage is mostly in an aggregate. |
|
| |
|
| To calculate the required depth, where the area of the facility is constrained:
| |
| <math>d=\frac{D\left[Ri-q'\right]}{V_{R}}</math>
| |
|
| |
|
| To calculate the require facility area or footprint where the depth is constrained:
| |
| <math>A_{p}=\frac{IiD}{V_{R}d+\left ( \frac{q}{SCF} \right )D}</math>
| |
|
| |
|
| {{Plainlist|1=Where: | | {{Plainlist|1=Where: |