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Q-2, r. 9.01 - Design code of a storm water management system eligible for a declaration of compliance
Section 77
Disposition versions
77. The runoff volume to be controlled for erosion is the volume established using equation 3-20:
Equation 3-20: Verosion = H2years × 0.75 × Atotal × Cr(p) × 10
where:
| Verosion | = | Runoff volume to be controlled for erosion (m3); | |
| H2years | = | Rain level associated with a period of 24 hours and having a 2-year return period based on the rainfall intensity-duration-frequency values (mm); | |
| 0.75 | = | Rain level adjustment factor; | |
| Atotal | = | Area of the installation or extension project of the storm water management system (ha); | |
| Cr(p) | = | Weighted runoff coefficient; | |
| 10 | = | Conversion coefficient for the units. |
In force: 2020-12-31
77. The runoff volume to be controlled for erosion is the volume established using equation 3-20:
Equation 3-20: Verosion = H2years × 0.75 × Atotal × Cr(p) × 10
where:
| Verosion | = | Runoff volume to be controlled for erosion (m3); | |
| H2years | = | Rain level associated with a period of 24 hours and having a 2-year return period based on the rainfall intensity-duration-frequency values (mm); | |
| 0.75 | = | Rain level adjustment factor; | |
| Atotal | = | Area of the installation or extension project of the storm water management system (ha); | |
| Cr(p) | = | Weighted runoff coefficient; | |
| 10 | = | Conversion coefficient for the units. |
