Tuesday, June 7, 2016

Green streets

Philly keeps stormwater out of sewers to protect rivers

Inquirer

Philadelphia Inquirer

This week marks the fifth anniversary of Philadelphia’s consent agreement signed with Pennsylvania environmental regulators, and the city says it has met its target of keeping more than 600 million gallons of rain out of the aging sewer system each year. It has done so with hundreds of water-absorbing "tools": Plant-studded green roofs, parking lots made of permeable pavement, stormwater trenches, and rain gardens.

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Appalachian water yields in decline since '70s

Science Daily

Newly published research shows water yields from unmanaged forested watersheds in the southern Appalachian Mountains declining by up to 22 percent a year since the 1970s. Changes in water yield were largely related to changes in climate, but disturbance-related shifts in forest species composition and structure over time also played a role.

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Bacterial studies may lead to less polluted waters

Science Daily

Phosphorus is a crucial nutrient regularly applied to crops such as corn and soybeans to help them grow efficiently. However, excess phosphorus can be carried by rainwater runoff into lakes and streams, creating potential problems for aquatic environments and the ecosystem services they provide to humans.

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