title: Diffuse pollution loading from urban stormwater runoff in Daejeon city, Korea.
abstract: In this paper, stormwater runoff from an urban watershed with combined sewer systems located in Daejeon metropolitan city, Korea, was characterized to measure the stormwater runoff discharge rates and pollutant concentrations. The observed averaged event mean concentrations (EMCs) of combined sewer overflows (CSO) were 536.1mg TSS/L, 467.7 mg TCODcr/L, 142.7 mg TBOD/L, 16.5mg TN/L, and 13.5mg TP/L. A detention basin was proposed to reduce CSO, and its essential design elements were discussed. The first flush significantly affected contaminant constituents in the descending order of suspended solid>organics>nutrients. Storage volumes for containing the first flush to improve water quality of the receiving stream can be estimated based on the total suspended solid loading. In this study, detention of the first flush equivalent to 5mm of precipitation could reduce CSO-induced diffuse pollution loading to a receiving water body by up to 80% of the total suspended solid loading.
authors.affiliation: Department of Civil and Environmental Engineering, Hannam University, 133 Ojeong-Dong, Daedeok-gu, Daejeon 300-791, Republic of Korea. kimgh@hannam.ac.kr
authors.forename: Geonha
authors.initials: G
authors.lastname: Kim
authors.forename: Joonghyun
authors.initials: J
authors.lastname: Yur
authors.forename: Jeongkon
authors.initials: J
authors.lastname: Kim
mesh_terms: D002947:Cities; D007723:Korea; D009584:Nitrogen / Q000032:analysis; D010758:Phosphorus / Q000032:analysis; D011891:Rain; D012722:Sewage; D014865:Waste Disposal, Fluid / Q000379:methods*; D014872:Water Movements; D014873:Water Pollutants / Q000032:analysis; D014876:Water Pollution / Q000032:analysis / Q000517:prevention & control*
chemical_list: D012722:Sewage; D014873:Water Pollutants; D010758:Phosphorus; D009584:Nitrogen