Columbia University Greens Up with Green Roofs

摘要

The seven green roofs atop buildings in and around Columbia University's Morningside Heights campus in Northern Manhattan total 18,180 square feet. New York City's annual rainfall averages 50 inches, and Columbia's green roofs can prevent as much as 420,000 gallons of stormwater runoff every year. With New York's stormwater management challenges, the reduction in the total amount and peak intensity of runoff from the University's green roofs contributes to an important environmental benefit for the city: reduced pollution and improved water quality.