截流式合流制地区河流水质对降雨的响应研究  

Study of Response of River Water Quality to Rainfall in Intercepting Combined Sewerage Area

作　　者：薛树红 康抗 刘园[1] 马龙 翟敏婷 王岩 XUE Shu-hong;KANG Kang;LIU Yuan;MA Long;ZHAI Min-ting;WANG Yan(PowerChina Northwest Engineering Corporation Limited,Xi'an 710065,China)

机构地区：[1]中国电建集团西北勘测设计研究院有限公司,陕西西安710065

出　　处：《水电能源科学》2022年第7期71-75,共5页Water Resources and Power

基　　金：西北旱区生态水利国家重点实验室课题。

摘　　要：为分析截流式合流制溢流对河流水质的影响,基于SWMM和MIKE11模型构建了某特大城市老城区排水系统和河流水质耦合模型,通过16场不同重现期及雨峰系数的降雨模拟分析,发现同一雨峰系数,重现期越大,溢流污染负荷越大,同一重现期、不同雨峰系数,降雨溢流污染负荷差异较小。雨后水质恢复时间与溢流污染负荷无必然联系,而与雨峰系数、降雨重现期有直接关系。同一重现期,雨峰系数越大,雨后水体水质恢复时间越长,同一雨峰系数,重现期越高,雨后水体水质恢复时间越短。研究揭示了降雨与截流式合流制溢流和河流水质的量化规律,对截流式合流制地区更合理地开展城市排水体制改造,保证汛期河流水质达标具有指导意义。In order to analyze the impact of combined sewer overflow(CSO) on the river water quality, taking an old town as an example, a drainage system and river coupling model was constructed based on SWMM and MIKE11. Simulation analysis of 16 rainfalls with different return periods and peak coefficients shows that under the same rain peak coefficient, the greater the return period, the greater the overflow pollution load is;Under the rainfall with the same return period conditions, the difference in overflow pollution load is small with different rain peak coefficients. The recovery time of water quality after rainfall is not necessarily related to the overflow pollution load, but is directly related to the rain peak coefficient and the rainfall return period. In the same return period, the greater the rain peak coefficient, the longer the water quality recovery time after rainfall is. In the same rain peak coefficient, the higher the return period, the shorter the water quality recovery time after rainfall is. The study reveals the quantitative law of rainfall and the overflow pollution of the interception combined system and river water quality, which has guiding significance for the intercepting combined system area to carry out the urban drainage system reform more rationally and ensure the river water quality to reach the standard in flood season.

关 键 词：截流式合流制溢流 初期雨水 耦合模型 河流水质 响应 

分 类 号：TU992[建筑科学—市政工程] TV11[水利工程—水文学及水资源]