Difference between revisions of "Flow through perforated pipe"
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Manufacturers of perforated pipe are often able to provide the open area (m<sup>2</sup>) per meter length. | Manufacturers of perforated pipe are often able to provide the open area (m<sup>2</sup>) per meter length. | ||
| − | <math>Q_{max, p}=B\times C_{d}\times A_{o}\sqrt{2\cdot g\cdot \sum d | + | <math>Q_{max, p}=B\times C_{d}\times A_{o}\sqrt{2\cdot g\cdot \sum d}</math> |
{{Plainlist|1=Where: | {{Plainlist|1=Where: | ||
*''K<sub>m</sub>'' is the hydraulic conductivity of the filter media (mm/hr), | *''K<sub>m</sub>'' is the hydraulic conductivity of the filter media (mm/hr), | ||
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*''d<sub>p</sub>'' is the depth of ponding (mm), | *''d<sub>p</sub>'' is the depth of ponding (mm), | ||
*''d<sub>m</sub>'' is the depth of the filter media (mm), and | *''d<sub>m</sub>'' is the depth of the filter media (mm), and | ||
| − | *''Σ d | + | *''Σ d'' is the total depth of bioretention components over the perforated pipe (mm) (e.g. ponding/[[mulch]]/[[filter media]]/[[choker layer]]), |
}} | }} | ||
Revision as of 22:15, 24 February 2018
Manufacturers of perforated pipe are often able to provide the open area (m2) per meter length.
Where:
- Km is the hydraulic conductivity of the filter media (mm/hr),
- Ap is the area of the practice (m2),
- dp is the depth of ponding (mm),
- dm is the depth of the filter media (mm), and
- Σ d is the total depth of bioretention components over the perforated pipe (mm) (e.g. ponding/mulch/filter media/choker layer),