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→Planning Considerations
Swales may be graded along longitudinal slopes between 0.5 - 6 %:
Swales may be graded along longitudinal slopes between 0.5 - 6 %:
*Check dams are required on slopes > 3 %.
*Between 1 - 6 %, check dams are recommended to bring the compensation gradient <1 %.
*Slopes > 6% can accommodate a series of stepped [[bioretention cells]], each overflowing into the next with a weir.
*Slopes > 6% can accommodate a series of stepped [[bioretention cells]], each overflowing into the next with a weir.