降雨特征对合流制排水系统径流污染负荷的影响  

Effect of Rainfall Characteristics on Urban Storm Runoff Pollution Load

作　　者：王俊松[1] 赵磊[1] 张晓旭[1] 

机构地区：[1]云南省环境科学研究院,云南高原湖泊流域污染过程与管理重点实验室,云南昆明650034

出　　处：《环境监测管理与技术》2016年第5期19-23,28,共6页The Administration and Technique of Environmental Monitoring

基　　金：国家水体污染控制与治理科技重大专项基金资助项目(No.2012ZX07102001-002);云南应用基础研究基金资助项目(No.2008ZC103M)

摘　　要：通过对昆明主城区典型合流制排水系统10次降雨径流过程水质水量的监测,计算次降雨污染负荷,并采用M(V)曲线和初期冲刷系数方法对降雨特征与次降雨污染、初期冲刷负荷之间的关系进行探讨。结果表明:10次降雨事件径流污染负荷存在明显的差异,SS、COD、TP和TN的次降雨污染负荷平均值分别为21.5 kg/hm^2、16.9 kg/hm^2、0.3 kg/hm^2、3.9 kg/hm^2;降雨量、最大雨强和平均雨强与次降雨污染负荷及初期冲刷强度呈显著正相关,是影响其初期冲刷的重要水文参数;降雨历时和前期晴天与次降雨污染负荷和初期冲刷强度没有相关性,二者对次降雨污染负荷和初期冲刷无明显影响。Study was made on typical combined drainage systems from Kunming main urban area. Ten typical rain were monitored and calculated for pollution load. The dimensionless accumulative mass loading vs. volume curve [M（V） curve ] and parameter b were used to discuss the relationship between the event pollution load and rainfall characteristics. Results showed that the pollution load of catchment was distinctly different in every rainfall. The mean event pollution load of SS, COD, TP and TN were 21. 5 kg/hm2 ,16.9 kg/hm2 , 0. 3 kg/hm2 and 3. 9 kg/hm2 respectively during the rainy season. Rainfalls, maximum and average rainfall intensity had significant positive correlation with the event pollution load and first flush, and were the critical hydrologic parameters to first flush. Rainfall duration and previous fine days had no correlation with the event pollution load and first flush.

关 键 词：城市降雨径流 合流制排水系统 初期冲刷 污染负荷 昆明 

分 类 号：X501[环境科学与工程—环境工程]