July 2013 - Parks & Recreation - 45

Greener
Waters
Parks for Cleaner

Philadelphia parks are crucial to the
city's water management system
By Amy Liu

H

ome to two major rivers and a vast network of creeks and streams,
the City of Philadelphia is also one of the nation's most urbanized
cities. Over the past century, many of Philadelphia's creeks and
streams have been replaced with sewer pipes and the city's natural surfaces
paved over or developed. This urbanization has essentially changed the water
cycle by preventing infiltration and groundwater recharge while compromising
the water quality of receiving rivers. To address federal requirements to improve water quality, the Philadelphia Water Department (PWD) has designed a
stormwater management plan, known as Green City, Clean Waters (GCCW),
that not only addresses the physical environment, but also brings additional societal benefits. In doing so, PWD has relied on the strength of its partnerships
with city agencies, such as Philadelphia Parks and Recreation (PPR), to craft
innovative and repeatable projects. This interagency collaboration has been
critical to PWD's success in implementing GCCW.
The combined sewage system that serves most of Philadelphia's prewar neighborhoods poses a substantial burden on the city's waterways. During significant
rainfall, sewage plants are overwhelmed by the combined flow of stormwater runoff and sewage. As a result, excess wastewater bypasses the sewage plants and

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July 2013 - Parks & Recreation

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