Q-2, r. 9.01 - Design code of a storm water management system eligible for a declaration of compliance

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146. The suspended matter reduction performance is established using equation 4-19 if water input to the grassed ditch is evenly distributed over the length of the ditch.
Equation 4-19
where:
P=Suspended matter reduction performance (%);
V=Average water flow speed (m/s);
L=Length of the grassed ditch (m).
Where the length of the ditch, L, is less than the product of the average water flow speed, V, multiplied by 600 seconds, V x 600, the suspended matter reduction performance, P, is 0%.
O.C. 871-2020, s. 146.
In force: 2020-12-31
146. The suspended matter reduction performance is established using equation 4-19 if water input to the grassed ditch is evenly distributed over the length of the ditch.
Equation 4-19
where:
P=Suspended matter reduction performance (%);
V=Average water flow speed (m/s);
L=Length of the grassed ditch (m).
Where the length of the ditch, L, is less than the product of the average water flow speed, V, multiplied by 600 seconds, V x 600, the suspended matter reduction performance, P, is 0%.
O.C. 871-2020, s. 146.