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Q-2, r. 9.01 - Design code of a storm water management system eligible for a declaration of compliance
Section 23
Disposition versions
23. The runoff peak flow, Q, of storm water management works whose design criterion is the runoff flow is established using equation 3-1:
Equation 3-1: Q = Cr(p) × A × i/360
where:
| Q | = | Runoff peak flow (m3/s); | |
| Cr(p) | = | Weighted runoff coefficient established using equation 3-2; | |
| A | = | Area of the territory draining to the storm water management work (ha) | |
| i | = | Rain intensity (mm/h); | |
| 360 | = | Conversion coefficient for units. |
Equation 3-2:
where:
| Cr(p) | = | Weighted runoff coefficient; | |
| Aj | = | Area of the homogenous surface j (m2); | |
| Crj | = | Runoff coefficient in relation to the homogenous surface j; | |
| m | = | Number of homogenous surfaces included in the territory draining to the water storm management system. |
In force: 2020-12-31
23. The runoff peak flow, Q, of storm water management works whose design criterion is the runoff flow is established using equation 3-1:
Equation 3-1: Q = Cr(p) × A × i/360
where:
| Q | = | Runoff peak flow (m3/s); | |
| Cr(p) | = | Weighted runoff coefficient established using equation 3-2; | |
| A | = | Area of the territory draining to the storm water management work (ha) | |
| i | = | Rain intensity (mm/h); | |
| 360 | = | Conversion coefficient for units. |
Equation 3-2:
where:
| Cr(p) | = | Weighted runoff coefficient; | |
| Aj | = | Area of the homogenous surface j (m2); | |
| Crj | = | Runoff coefficient in relation to the homogenous surface j; | |
| m | = | Number of homogenous surfaces included in the territory draining to the water storm management system. |
