Roadside grassed swales or drainage ditches are an attractive storm water control measure
because they can infiltrate water into the soil, filter sediments and associated pollutants out of
the water and settle solids onto the soil surface. Measured infiltration parameters such as
saturated hydraulic conductivity (Ksat), however, have spatial variation of up to two orders of
magnitude; even in engineered soil. Thus, one infiltration measurement has great uncertainty.
For this, study measurements of Ksat were taken at 108 locations at a selected swale located in
Madison, WI to quantify their spatial variability.
research location swale located near Hwy 51, Madison, WI.
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