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Line 22: − #The minimum total depth may be limited by the need to support vegetation (e.g. not less than 0.6 m for deeply rooting perennials and shrubs). − +
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#The ''maximum'' total depth will be limited by construction practices i.e. usually ≤ 2 m.
#The ''maximum'' total depth will be limited by construction practices i.e. usually ≤ 2 m.
#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.
#[[Green roofs]], [[absorbent landscapes]] and [[permeable paving]] often receive very little flow from other surfaces, so that the I/P ratio is close to 1.
#[[Green roofs]], [[absorbent landscapes]] and [[permeable paving]] often receive very little flow from other surfaces, so that the I/P ratio is close to 1.
#[[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 impervious drainage area to pervious (infiltration footprint) area (I/P ratio) of 20.
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