@msolga,
Thats the point of porous parking lots (PPL's), they almost return the raped land to its natural infiltration rate. (Actually, in some areas, aPPL will improve the natural infiltration).
Weve suffered the growth limit definition in cities like Las Vegas where we waste water so much and yet its a fuckin DESERT for chrise sake. The fountains that essentially spray a stream of water that evaporates as it goes up is ridiculous. Meanwhile, Atlantic City, which is right on the water , is turning into a ghost town.
"we" is a collective. My company (my desiign guys) have designed all kinds of infiltration galleries, porous pavements, and rain gardens for infiltration and conservation. I just hear about em at our tech review sessions.