Hydrologic Modeling of Green Infrastructure in an Urban Sewershed

We applied a hydrologic model (ParFlow.CLM) to a medium density, residential neighborhood in Washington DC to model the effects of spatial configuration of green infrastructure (GI) and site imperviousness on hydrologic response. Nine spatial configurations are tested: a base case, all public right-of-way treated with GI, all private roofs treated with GI, roofs on properties with greater/less than mean property flow accumulation treated with GI, roof disconnection, maximum allowable site imperviousness, and removal of roofs on properties with greater/less than mean property flow accumulation. We have included the input files to run the ParFlow simulations (2015-03-01 – 2015-09-01), the model source code, and the calculated overland flows and the rainfall-runoff depths corresponding to the sewershed boundary for each scenario.