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;m
:run of side slopes in channel cross sections (length, but usually expressed as a ratio in relation to rise. e.g. where side side slopes = 1:3.5, m = 3.5)
;q
;q
:infiltration rate in units of length per time. (before or after application of safety factor?)
:infiltration rate in (length per time, usually mm/hr) (before or after application of safety factor?)
;SCF
;SCF
;R<sub>a</sub>
;R<sub>a</sub>
:Existing rise of swale gradient
:Existing rise of swale gradient (length, usually m)
;R<sub>b</sub>
:Rise of compensation gradient for an enhanced swale (length, usually m)