Kim Geonha, Yur Joonghyun, Kim Jeongkon
Department of Civil and Environmental Engineering, Hannam University, 133 Ojeong-Dong, Daedeok-gu, Daejeon 300-791, Republic of Korea.
J Environ Manage. 2007 Oct;85(1):9-16. doi: 10.1016/j.jenvman.2006.07.009. Epub 2006 Sep 18.
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.
本文对韩国大田广域市一个具有合流制排水系统的城市流域的雨水径流进行了特征分析，以测量雨水径流量和污染物浓度。观测到的合流制排水系统溢流（CSO）的平均事件平均浓度（EMC）分别为：总悬浮固体（TSS）536.1mg/L、化学需氧量（TCODcr）467.7mg/L、生化需氧量（TBOD）142.7mg/L、总氮（TN）16.5mg/L和总磷（TP）13.5mg/L。提出了一个滞洪池以减少合流制排水系统溢流，并讨论了其基本设计要素。初期雨水冲刷对污染物成分有显著影响，影响程度从高到低依次为悬浮固体>有机物>营养物质。可以根据总悬浮固体负荷估算用于容纳初期雨水冲刷以改善受纳河流水质的储存容积。在本研究中，滞留相当于5毫米降水量的初期雨水冲刷，可将合流制排水系统溢流引起的对水体的面源污染负荷降低至总悬浮固体负荷的80%。
