![]() ![]() ![]() Six different representations of a common urban scape that discharges runoff to a single storm inlet were evaluated with eight 24 h synthetic storms. To verify the spatial discretization approach, a hypothetical analysis was conducted. The model relies on a highly resolved spatial database of urban land cover, stormwater drainage features, and topography. Environmental Protection Agency’s Storm Water Management Model (SWMM) is demonstrated for the Shayler Crossing watershed, a well–monitored, residential suburban area occupying 100 ha, east of Cincinnati, Ohio. With these criteria in mind, an approach to spatial discretization for projects using the U.S. This separation provides an improved model representation of the runoff process. Pervious buffers, which receive runoff from upgradient impervious areas should also be identified as a separate subset of the entire pervious area. For green infrastructure modeling, we suggest a discretization method that distinguishes directly connected impervious area from the total impervious area. Models are used to simulate the runoff characteristics, but the output from a stormwater management model is dependent on how the catchment area is subdivided and represented as spatial elements. Urban stormwater runoff quantity and quality are strongly dependent upon catchment properties. ![]()
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