Ecological Treatment of Urban Storm Water Runoff:Treatment and Progress

Urban development rapidly these years and it caused the amount of stormwater runoff increasing,surface runoff pollution and groundwater depletion.So it was necessary to treat storm water runoff by ecological ways.In this paper,we made a comprehensive comparative study of the advantages-,disadvantages,purification mechanism and the applied conditions of different ecological techniques-,-including grassed filtering belt,grassed swale,bio-retention system,rainstorm pond,rainstorm wetland and so on.At the end of the paper,we gave prospects of urban runoff ecological treatment application in China.The results would be useful for eco-city construction and water environment improvement.