Wednesday, December 20, 2006

Wetland Arks in Princeton

Here's a typical detention basin, a required feature in any new construction. They dot the Princeton landscape, mostly at housing developments. This one happens to be at Farmview Park, a new township park on the Great Road, across from Coventry Farm.

They are curious structures. Down their middle is what has been called a "Sidewalk to Nowhere" that deadends at a concrete mausoleum-like structure. Stormwater enters one end of the basin, runs down the sidewalk, and drains out at a controlled rate through the concrete tower. During heavy rains, some water will be held back in the basin, reducing flash flooding.

Though the basins have their use, I don't think "turf pit" is too unflattering a name. They aren't pretty, require frequent mowing, and offer no habitat or recreational value.

Here's another, more gentrified basin, brand new, nestled between the two new wings of Princeton High School. It receives not only runoff from the roof, but also gets steady infusions from the school basement's sump pump.

Dreams do not often feed on such prosaic fare as sump pumps and detention basins. But I look at these basins and see something akin to an open-hulled Ark--precious wet, sunny, legally protected real estate where some of the prettiest and toughest of New Jersey's native wildflowers could flourish.

Two such transformations may actually happen this coming spring, judging by the strong support thus far from Princeton Township and Princeton High School administrators, board members and teachers. Funding and expertise has been offered by Partners for Fish and Wildlife, an agency in the federal Fish and Wildlife Service.

Working for Friends of Princeton Open Space, my role in this is as catalyst with phone calls and emails, suggesting there's an opportunity and bringing the people together who can make it happen. Then, if all goes well, there will be some attention to pay to all the plants put in, to nurture them while they get established, to prevent aggressive weeds from moving in, and to add more native species as time goes on.

Pictures of a few of the wetland species to be planted--Hibiscus, cutleaf coneflower, etc.--can be found in earlier postings on this weblog. Prairie grasses will be planted on the upland edges of the basin. Below is a photo of Indian grass, a constituent of tallgrass prairies in the midwest that is also common on the outskirts of Princeton.

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