Stormwater Symposium

Oral

397879 - Modeling Approaches to Tracking the Longitudinal Influence of Stormwater Controls

Monday, June 4
4:00 PM - 5:30 PM
Location: Greenway AB

It is commonly believed that the answer to urban storm water management issues is green infrastructure (GI). However, while GI is typically implemented to control runoff from individual parcels to ensure there is no excess runoff beyond the property line, downstream impacts are rarely examined. In addition, important siting and sizing decisions are often made based on results from disparate models such as SWMM and STEPL. The choice of model is an important decision since model complexity is inversely proportional to the level of detail required for model input and directly proportional to the level of detail provided in model output. In this study, the longitudinal influence of multiple individual GI practices located in southeast Pennsylvania was examined using SWMM and again using STEPL. The results of this modeling exercise demonstrated that SWMM and STEPL yield similar results for average annual loads. However, SWMM output is more detailed and this detail can provide information on the statistical significance of the GI performance at the event time scale as well as at the annual time scale. In addition, SWMM can easily assess the downstream strength of both the hydrologic and water quality signature in order to assess the significance of the improvements made by the proposed GI.

Robert J. Ryan, P.E., D. WRE

Associate Professor
Temple University

Presentation(s):

Send Email for Robert Ryan

Manahel Soro

Lead Research Associate
Temple University, Ambler

Presentation(s):

Send Email for Manahel Soro


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