A green infrastructure was designed to capture and use stormwater runoff from an existing impervious parking lot at West Virginia University (WVU) to offset potable water use for a cooling system on campus. The system consists of an already existing stormwater retention pond; filtration system; and a storage tank. Flow balance and treatment analyses were performed to estimate runoff volumes, storage capacities and to design the treatment to meet acceptable quality levels for cooling operation.;Using the daily rainfall records (01/01/2007 -- 10/30/2012), the analyses showed that the stormwater runoff from the studied parking lot can offset approximately 57.1% to 121.6% of the current make-up water flow for the cooling system with 4% of the filtered water used for back-wash operations. Monte Carlo analysis conducted with a range of runoff parameter value (84-100) for the parking lot indicated that the system could consistently provide at most 3.83 times and at least 0.51 times the annual make-up water volume for the cooling system. With the components chosen for the green infrastructure, the design has the capability of improving the water quality for make-up use.
展开▼
