GreenPhilly Research Group StormWISE Web App

StormWISE Overbrook Case Study

Green Commercial Corridor, Lancaster Avenue, West Philadelphia

Based on concepts developed by the Overbrook Environmental Education Center

Switch to Wingohocking Model Guide & Documentation

Please Read This Guide Before Starting Your First StormWISE Session

The map below shows the boundaries of the Mill Creek Sewershed superimposed on an aerial image of Philadelphia, with scales showing latitude and longitude. The black line shows the entire Mill Creek Sewershed. Sewer overflows spill into the Schuylkill River in West Philadelphia at the bottom of the sewershed. The green line shows the boundaries of the Overbrook Green Commercial Corridor. In our Overbrook StormWISE case study, green infrastructure installations are installed only in the Green Commercial Corridor, but the reductions in CSO flows resulting from their installation appear at the Schuylkill River outfall.

Boundary of Mill Creek Sewershed
Rain Barrels

Our Overbrook Case Study places Rain Barrels, Tree Trenches, and Rain Gardens at sites in each of the four different land use categories: Transportation, Residential, Commercial, and Industrial. These three types of green infrastructure were chosen because we are able to accurately model their effectiveness in reducing CSOs using EPA's Storm Water Management Model (SWMM). Philadelphia's Water Department also uses SWMM extensively throughout the City to model stormwater runoff and sewer flows. Photos of typical Philadelphia installations are shown below. Click on these images to enlarge them.

Philadelphia Tree Trench
Philadelphia Rain Garden

Click New Session to clear results

This will reset all inputs to their default values and removes any accumulated results.

  1. Set importance for each co-benefit

In the optimization step, the core solver will favor co-benefits that are more highly weighted, and disfavor co-benefits that are less highly weighted. You may use these inputs to choose which co-benefits you care about most.

Benefit Importance (Weight)
More Open Space
Improving Aesthetics
Green Canopy Cooling
More Green Jobs
Lower GI Maintenance Cost
Lower Sewer Fees
  • Set suitability for each green infrastructure type

Each installed type of green infrastructure produces fixed amounts of CSO reduction and co-benefits, such as green canopy. But the total number of sites where a certain green infrastructure can be installed varies depending on the category of land use where it is installed. If you believe that any of the three different green infrastructure types evaluated here may be more or less well suited for the Overbrook neighborhood, you can change the settings below, by land use. The core solver will use these settings to adjust how much of each green infrastructure type can be built on each of the different land uses that are present in the Green Commercial Corridor.

Land Use
Rain Barrels

Tree Trenches

Rain Gardens
  1. Click Optimize to generate results

The results displayed are generated behind the scenes (on our remote server) by running the core solver hundreds of times, with each run representing a different magnitude of green stormwater implementation in the planning area.

  1. Results

You may use the plots and charts displayed here to answer questions about how best to target the investments with regard to the types of green infrastructure to install and the places to deploy them so as to achieve the required CSO reductions at the least cost in investment dollars and to maximize the measure of community co-benefits that incorporates your specified weighting. The map of the Mill Creek Sewershed below allows you to zoom in to show greater detail or to zoom out to get a better idea of where the sewershed is located in Philadelphia.