Non-piont source pollution and stormwater management practices of parking lot

As one of the urban infrastructure, parking lot holds a large proportion in the urban impervious area. Characteristics of parking lots and their negative effects to environment ware analyzed. The main pollutants in parking lot runoff and the event mean concentration of those pollutants ware listed. Representative stormwater management technologies in parking lot ware introduced, such as permeable pavements, grass swale and rain garden. A case study of retrofits in parking lot was presented briefly. It was pointed out that new stormwater management practices should be adapted to the design and construction of parking lot, and the resource-saving and environment-friendly parking lot incorporated with stormwater management practices should be established as soon as possible in Chinese cities.