Consolidated Statutes and Regulations
Consolidated Statutes
Consolidated Regulations
Annual Statutes and Regulations
Annual Statutes
Annual Regulations
Additional information
Québec Official Publisher
What’s new?
Information note
Policy of the Minister of Justice
Laws: Amendments
Laws: Provisions not in force
Laws: Provisions brought into force
Annual Statutes: PDF versions since 1996
Regulations: Amendments
Annual Regulations: PDF versions since 1996
Court Decisions
Q-2, r. 9.01 - Design code of a storm water management system eligible for a declaration of compliance
Section 26
Disposition versions
26. The minimum storage volume of storm water management works whose design criterion is the runoff volume corresponding to the maximum value of the differences between the runoff volume entering the storm water management work established using equation 3-7, Vinflow, and the volume leaving established using equation 3-8, Voutflow, obtained following a succession of calculations for which the rain duration, t, is increased by 5-minute increments from 5 minutes to 360 minutes.
Equation 3-7: Ventrant = [Cr(p) × Atotal × (i × M)/6] × t
where:
| Ventrant | = | Runoff volume entering the storm water management work during the time, t, and for the 100-year return period (m3); | |
| Cr(p) | = | Weighted runoff coefficient calculated under equation 3-2; | |
| Atotal | = | Area of the surfaces drained to the storm water management work (ha); | |
| i | = | Rain intensity associated with time, t, for the 100-year return period (mm/h); | |
| M | = | Increase to take into account the effects of climate change; the value of the increase must equal to or greater than 1.18; | |
| 6 | = | Conversion coefficient for the units; | |
| t | = | Duration of the rainfall (min); |
Equation 3-8: Voutflow = k × Qoutflow × t × 60
where:
| Voutflow | = | Volume leaving the storm water management work during time t (m3); | |
| k | = | Value of the discharge factor as determined using figure 3.1; | |
| Qoutflow | = | Maximum flow leaving the flow control device (m3/s) established in accordance with Division V of Chapter III; | |
| t | = | Duration of the rainfall (min); | |
| 60 | = | Conversion coefficient for the units. |
Figure 3.1 Value of the discharge factor, k, established according to the ratio of the controlled flow from the flow control device (Qoutflow) and the peak inflow (Qinflow).
In force: 2020-12-31
26. The minimum storage volume of storm water management works whose design criterion is the runoff volume corresponding to the maximum value of the differences between the runoff volume entering the storm water management work established using equation 3-7, Vinflow, and the volume leaving established using equation 3-8, Voutflow, obtained following a succession of calculations for which the rain duration, t, is increased by 5-minute increments from 5 minutes to 360 minutes.
Equation 3-7: Ventrant = [Cr(p) × Atotal × (i × M)/6] × t
where:
| Ventrant | = | Runoff volume entering the storm water management work during the time, t, and for the 100-year return period (m3); | |
| Cr(p) | = | Weighted runoff coefficient calculated under equation 3-2; | |
| Atotal | = | Area of the surfaces drained to the storm water management work (ha); | |
| i | = | Rain intensity associated with time, t, for the 100-year return period (mm/h); | |
| M | = | Increase to take into account the effects of climate change; the value of the increase must equal to or greater than 1.18; | |
| 6 | = | Conversion coefficient for the units; | |
| t | = | Duration of the rainfall (min); |
Equation 3-8: Voutflow = k × Qoutflow × t × 60
where:
| Voutflow | = | Volume leaving the storm water management work during time t (m3); | |
| k | = | Value of the discharge factor as determined using figure 3.1; | |
| Qoutflow | = | Maximum flow leaving the flow control device (m3/s) established in accordance with Division V of Chapter III; | |
| t | = | Duration of the rainfall (min); | |
| 60 | = | Conversion coefficient for the units. |
Figure 3.1 Value of the discharge factor, k, established according to the ratio of the controlled flow from the flow control device (Qoutflow) and the peak inflow (Qinflow).
