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Public Works & Utilities


Philadelphia’s ‘Green’ Formula Fosters Swimmable, Drinkable Water

Philadelphia’s ‘Green’ Formula Fosters Swimmable, Drinkable Water

Philadelphia's 'Green' Formula Fosters Swimmable, Drinkable Water By Neal Peirce Big pipes to drain off stormwater arent necessarily your friend. They
  • Written by American City & County Administrator
  • 22nd August 2006

Philadelphia’s ‘Green’ Formula Fosters Swimmable, Drinkable Water

By Neal Peirce

Big pipes to drain off stormwater arent necessarily your friend. They may even be the reason the stream or river near your home isnt fit for swimming.

The message may sound strange to communities recently hit by torrential rains, or threatened by oncoming tropical storms.

But the green revolutionaries of Philadelphias Office of Watersheds are expounding a new philosophy of sustainable water management — to adapt city parks, roadways, school sites, lawns and yards so that they absorb and slowly filter out as much rainfall and stormwater as feasible.

Why? First, to stop stormwater from flooding drainage systems and sending untreated sewage into local rivers and streams.

Second, to minimize the fast, storm-induced runoff by pollutants that gather on a citys concrete and asphalt surfaces — litter, oil and antifreeze leaked from cars, pesticides, corroding metals from junkyards, bacteria from pet waste. All these are top sources for the generalized, non-point pollution that makes so many local beaches dangerous for swimming (14,602 closing and advisory days last year, reports the Natural Resources Defense Council).

Finally, heavy storms choke off streams and pollute the waterways with sediment from scraped-off land, construction sites and improperly protected farm fields.

Cities usual way of dealing with stormwater has been to collect and move it off site as rapidly as possible, often with big, expensive tanks and tunnels to hold the overflow and its sediments as long as feasible. Several major U.S. cities are building precisely such facilities right now.

But the Philadelphians are aiming instead to make their entire city into a kind of great green sponge, an urban ecosystem that can handle its stormwaters and wastes far more naturally and, in the process, assure clean and reliable water for fishing, swimming and drinking.

The holistic thinking has been spearheaded since 1998 by Howard Neukrug, founding director of the citys Office of Watersheds. Rather than focusing on new pipes, for example, Neukrugs office puts a priority on cleanup, preservation and easy public access to the parks.

Why? The Schuylkill River and several of its tributary streams, source of Philadelphias water supply, run through massive Fairmount Park and other city parks. Parklands, says Philadelphia watersheds planner Glen Abrams, are like kidneys, performing natural restorative work for a citys water systems. But if streambeds are degraded and trash-filled, if citizens cant enjoy the waters, wholl fight to keep the parks waterways clean, fishable and swimmable?

Across the city, the watersheds office pushes its green, natural agenda. It advocates stream daylighting, for example — bringing old streams, buried in culverts, back to the surface and recreating their banks and natural habitat. It encourages environmental stewardship of Philadelphias large supply of vacant land, pushing for introduction of little swales and bowls and berms to make the sites better short-term repositories of stormwater.

Theres a campus parks initiative to help the public schools redeem ugly asphalt-paved schoolyards with greenery and renew basketball courts with newly-developed asphalt that rather amazingly absorbs rather than repels water.

The agency is also working with the street department to redesign traffic triangles, street medians and right-of-way land to minimize runoff and absorb water more naturally. Its advocating rainwater harvesting — rainspout barrels homeowners can attach to water downspouts and use later for garden watering. Its pushing urban gardening, advocating green roofs, creating nature-friendly master plans for former industrial riverfronts. In what they call Operation PIGSTY, inspectors are being pushed to crack down on heavily polluting scrap yards.

And when the watershed crew discovered a huge colony of geese flocking onto land above a water intake and dropping as much as 36 tons of waste there annually, it repelled the unwelcome feathered visitors by planting high meadow grasses that geese studiously avoid. Philadelphias quandary is that the Schuylkill flows over 100 miles, draining portions of 10 counties and 2,000 square miles before it reaches the city. Once one of Americas most polluted rivers, its recovered significantly through federally mandated point-source cleanup of major pollutants. Yet the river is still plagued by stormwater runoff, bad agricultural practices (like cows standing in streams), abandoned mine drainage and sewage overflows.

So the Philadelphia Water Department conducted a nationally recognized source assessment, including analysis of water quality at 52 intake points up and down the entire river. More than 3,000 pollution points were discovered, and 100 top cleanup priorities named. Then the Philadelphians formed a Schuylkill Action Network with federal and state agencies and dozens of upstream communities. The network is pinpointing issues from abandoned mine discharges to agricultural abuses. Neukrug also warns against suburban sprawl that destroys buffering landscapes and increases stormwater runoff.

The effort is new, its challenges immense. But heres an exciting national model: how a city enhances its environment, safeguards its water lifelines, engages federal and state agencies, and leads a region.

Source: Stateline.org.

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