A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Modeling Non-Directly Connected Impervious Areas in Dense Neighborhoods
A dense residential neighborhood of 16.9 ac (6.8 ha) in Portland, Oregon experiences basement flooding problems and flow capacity problems in its combined sewers. Low impact development (LID) alternatives, such as disconnection of downspouts from roofs, are being explored by the City of Portland as one means of alleviating the problem. The EPA Storm Water Management Model (SWMM) model has been used to simulate runoff from the area under current conditions and under hypothetical LID for which runoff from roofs and driveways is directed over adjacent pervious areas. Both an aggregated model representation (eleven subcatchments) and a disaggregated model representation (118 subcatchments, including 115 subcatchments representing each house parcel) have been studied. Predicted hydrographs compare well with City of Portland Bureau of Environmental Services (BES) monitored flows for the neighborhood for both model representations. The hypothetical LID simulation results in over a 50% reduction in hydrograph peaks and volumes.
Modeling Non-Directly Connected Impervious Areas in Dense Neighborhoods
A dense residential neighborhood of 16.9 ac (6.8 ha) in Portland, Oregon experiences basement flooding problems and flow capacity problems in its combined sewers. Low impact development (LID) alternatives, such as disconnection of downspouts from roofs, are being explored by the City of Portland as one means of alleviating the problem. The EPA Storm Water Management Model (SWMM) model has been used to simulate runoff from the area under current conditions and under hypothetical LID for which runoff from roofs and driveways is directed over adjacent pervious areas. Both an aggregated model representation (eleven subcatchments) and a disaggregated model representation (118 subcatchments, including 115 subcatchments representing each house parcel) have been studied. Predicted hydrographs compare well with City of Portland Bureau of Environmental Services (BES) monitored flows for the neighborhood for both model representations. The hypothetical LID simulation results in over a 50% reduction in hydrograph peaks and volumes.
Modeling Non-Directly Connected Impervious Areas in Dense Neighborhoods
Huber, Wayne C. (author) / Cannon, LaMarr (author)
Ninth International Conference on Urban Drainage (9ICUD) ; 2002 ; Lloyd Center Doubletree Hotel, Portland, Oregon, United States
2002-09-05
Conference paper
Electronic Resource
English
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