Serramonte Library Green Parking Lot
|Rainwater flows through the parking area collecting dust, litter, oil, and grease. The polluted rainwater is collected at the gutter and then directed through diversion channels to the bio-retention gardens.|
|Within the bio-retention gardens, the water is cleaned through infiltration into the soil and transpiration through the plants. The garden basins are designed to hold stormwater, and the soil and plants provide adequate time for these processes to occur.|
The resulting Stormwater Treatment Garden is designed to clean stormwater from the parking area before it flows into Colma Creek and then into San Franscisco Bay.
Native plants can handle long periods without rain, as well as periods of heavy rain and inundation. They include California Tule, Iris, Daffodils, and Lupine.