The Water Quality requirement stipulates infiltration of the first 1.5 inches of runoff from all directly connected impervious area (DCIA) within the limits of earth disturbance. This volume of stormwater runoff is referred to as the Water Quality Volume (WQv).

In an urban, developed environment such as Philadelphia, rain falls on the ground, “runs off” and flows into the sewer system. This water is referred to as stormwater or stormwater runoff. Why do we need to manage stormwater?

Mar 29, 2018 · In a major initiative, Philadelphia is building an extensive network of rain gardens, green roofs, wetlands, and other infrastructure to capture stormwater. The goal is to prevent runoff from overwhelming sewers and polluting waterways and to help green America’s fifth-largest city.

Green stormwater infrastructure tools allow runoff to get soaked up by plants, filter into the ground, or evaporate into the air. Some systems also slowly release the water into a sewer once wet weather and the threat of overflows have passed.

May 26, 2016 · Since 2011, it’s been working to reduce Philadelphia’s concrete jungle and increase its permeable surface area. “If we plant more plants and trees throughout the city, that will restore some of the natural water cycle, and soak up …

Stormwater -- surface water generated during a rainstorm or when snow melts -- runs off roads, parking lots, and roofs, picking up oil, dirt, and other pollutants as it makes its way to storm drains. Sixty percent of Philadelphia’s storm drain system is a combined system that mixes with household wastewater.

Dec 12, 2024 · Green Philadelphia stormwater regulations also pinpoint impervious surfaces, which prevent water from entering the ground and can cause runoff and flooding. Adjusting existing impervious surfaces and implementing green infrastructure helps with flooding and stormwater drainage in Philadelphia.

Aug 15, 2024 · To manage contaminated stormwater, Philadelphia went all in on “green” infrastructure, like rain gardens and permeable pavement. But an increase in extreme rain events is spurring other U.S. cities to double down on traditional sewer …

Jun 28, 2018 · Philadelphia’s long-running efforts to control its stormwater flows took a step forward Thursday with the official opening of a facility that will capture 60 million gallons a year of runoff from 20 commercial properties in Northeast Philadelphia.

Surface runoff from the directly connected impervious areas were designed to be connected by inlets strategically located throughout the site and drained to the bioretention basin. The basin is equipped with an outlet structure that