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Line 23:
Line 23: − #[[Green roofs]], [[absorbent landscapes]] and [[permeable paving]] often receive very little flow from other surfaces, so that the I/P ratio is typically between 0 and 2.
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#The ''maximum'' total depth may be limited by the [[Infiltration| conditions underground]] (e.g. the groundwater or underlying geology/infrastructure).
#The ''maximum'' total depth may be limited by the [[Infiltration| conditions underground]] (e.g. the groundwater or underlying geology/infrastructure).
#The ''maximum'' total depth may be limited by the need to support vegetation cover over it (e.g. at least 30 cm of planting soil backfill over the BMP to support grasses)
#The ''maximum'' total depth may be limited by the need to support vegetation cover over it (e.g. at least 30 cm of planting soil backfill over the BMP to support grasses)
#[[Infiltration trenches]], [[Infiltration chambers| chambers]] and [[bioretention]] have a maximum recommended I/P ratio of 20.
#[[Infiltration trenches]], [[Infiltration chambers| chambers]] and [[bioretention]] have a maximum recommended I/P ratio of 20.