title: [Construct of Yangtze-Huai River rural areas ecological drainage system and its retention effect on pollutants].
abstract: Ecological drainage system (EDS) including ditches, ponds and wetland was constructed at the Paifangchen village on the north of Chaohu Lake, Anhui, and its retention effect on pollution was investigated. With the comprehensive function of sewage discharge, collecting and process, the system could intercept runoff pollutants effectively. The results acquired from 3 rainfall events showed that the retention rates of EDS to TSS, COD, TP and TN were 78.2%, 57.8%, 55.5% and 64.2% respectively, and the concentrations at outflow of the system to TSS, COD, TP and NH4(+) -N were 23.5, 66.3, 0.49 and 3.03 mg x L(-1) separately, met the first standard of "Integrated Wastewater Discharge Standards". Ponds were the important unit of EDS and the daily water quality concentrations of TSS, COD, TP and TN were 28.0, 31.2, 0.47 and 4.65 mg x L(-1) respectively, met the V standard of "Environment Quality Standards for Surface Water" basically.
authors: State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. bqshan@rcees.ac.cn
authors: Bao-Qing
authors: BQ
authors: Shan
authors: Nan
authors: N
authors: Li
authors: Wen-Zhong
authors: WZ
authors: Tang
mesh_terms: D002681:China; D011891:Rain; D045483:Rivers / Q000737:chemistry; D012424:Rural Population; D014865:Waste Disposal, Fluid / Q000379:methods*; D014872:Water Movements; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014876:Water Pollution / Q000517:prevention & control; D053833:Wetlands
chemical_list: D014874:Water Pollutants, Chemical