New York, like other large cities, has a lot of impermeable services which means that when it rains there is little to contain the water. By using green infrastructure of soil, broken stone, shrubs, trees, etc. the bioswales can capture a lot of water. This green infrastructure is good for water management and obviously benefits the local environments through cleaner air and more pleasant views.
The Big Apple’s pretty new bioswales, built into city sidewalks much like standard tree pits and more modest in size than their suburban brethren, will join about 250 of these aesthetically pleasing drainage ditches that have already popped up around the city as part of the city’s stormwater management-focused Green Infrastructure Program.
The price tag attached to this aggressive — and much needed — onslaught of vegetated swales is $46 million.
While that might seem like a hefty wad of cash for the city to dedicate to curbside rain gardens, it’s nothing compared to the costs associated with upgrading New York’s aging combined sewage system (a system that handles both
storm runoff and domestic sewage) and cleaning up after perfectly foul combined sewage overflow
(CSO) events that strike following heavy rainstorms (and, of course, hurricanes
Thanks to Shealyn!