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Q-2, r. 9.01 - Design code of a storm water management system eligible for a declaration of compliance
Section 109
Disposition versions
109. The volume for the accumulation of sediments provided for in the water and sediment accumulation zone must correspond to at least the smaller of the following values, irrespective of the volumes calculated for the pretreatment cell and the microbasin, where applicable:
(1) 20% of the runoff volume to be treated;
(2) the volume established using equation 4-8:
Equation 4-8: VMES = Msed. × N × Aimp × P/100
where:
| VMES | = | Reserve volume for the accumulation of sediments (m3); | |
| Msed. | = | Volume of sediments produced per year per hectare (m3/year/ha): minimum value: 0.68; | |
| N | = | Expected number of years of operation without maintenance (year); minimum value: 5; | |
| Aimp | = | Area of impervious surfaces drained to the dry retention system (ha); | |
| P | = | Suspended matter reduction performance determined in accordance with figure 4.2 (%). |
In force: 2020-12-31
109. The volume for the accumulation of sediments provided for in the water and sediment accumulation zone must correspond to at least the smaller of the following values, irrespective of the volumes calculated for the pretreatment cell and the microbasin, where applicable:
(1) 20% of the runoff volume to be treated;
(2) the volume established using equation 4-8:
Equation 4-8: VMES = Msed. × N × Aimp × P/100
where:
| VMES | = | Reserve volume for the accumulation of sediments (m3); | |
| Msed. | = | Volume of sediments produced per year per hectare (m3/year/ha): minimum value: 0.68; | |
| N | = | Expected number of years of operation without maintenance (year); minimum value: 5; | |
| Aimp | = | Area of impervious surfaces drained to the dry retention system (ha); | |
| P | = | Suspended matter reduction performance determined in accordance with figure 4.2 (%). |
