Preliminary Study on Treatment of First-flush Stormwater

Because the first-flush stormwater carries high concentration pollutants,the pollution problem caused by its discharge into waters has attracted much attention.The control of pollutants carried by the first-flush stormwater should be considered from following three aspects:① source reduction and on-site treatment;② collection and storage and ③ enhanced maintenance.For the cities with many lakes,the on-site treatment and end constructed wetland should be integrated.The surface runoff conditions are changed to increase the infiltration and reduce the runoff.The on-site treatment facilities are used to appropriately treat stormwater before it flows into lakes and rivers.These measures can reduce pollution load of stormwater and improve water environment.