"Tropical Storm Girard unleashed a torrent of water on West Philadelphia in March.
Missed that news? It was not a real storm, but it might as well have been.
Philadelphia Water Department employees turned on a fire hydrant on West Girard Avenue for three hours, enough to fill up two longish ditches with 35,000 gallons of water - an experimental simulation of 3.5 inches of rain. Then they watched it disappear.
The ditches are rain gardens, brimming with grasses, flowers, and monitoring equipment, and they are part of an underground revolution."