湖泊科学2017，Vol.29Issue(2)：285-296,12.DOI:10.18307/2017.0204
巢湖流域塘西河上游分流制系统降雨径流污染特征及初期冲刷效应
Analysis of pollution characteristics and first flush effect in rainfall runoff in separate storm sewer system in upstream of Tangxi River,Chaohu Catchment
摘要
Abstract
Understanding the runoff water quality and first flush effects can guide the management of urban runoff pollution. Six rainfall events were monitored and event mean concentration( EMC) and event pollutant loads per unit area( EPL) were calculated in the upstreams of Tangxi River. The M( V) curve was used to show the first flush effects. The results showed that the EMC of sus-pended solids(SS), chemical oxygen demand(CODCr) and total phosphorous(TP) were relatively large in rainfall runoff. The EMC of SS has the most significant fluctuations. There was a positive correlation beween total nitrogen(TN), TP, CODCr and SS. The EMC of TN was negatively correlated with the rainfall. The EPL of runoff water pollution has a positive correlation with the rainfall characteristics. Approximately 10.38 t TN, 2.29 t TP, 1022.43 t SS, 161.70 t CODCr and 5.18 t NH3-N were input into the Lake Chaohu via runoffs in June, July, and August, 2015.Rainfall and antecedent dry weather period were the main influen-cing factors of the urban storm runoff pollution. Five kinds of pollutants had their own first flush effects, employing the FF50>50 as the standard, the magnitude of the first flush effect was SS>CODCr>TP>TN>NH3-N. There was no correlation between the magni-tude of first flush and rainfalls. The rainfall pattern could have a strong effect on the first flush effect. It is recommended to closure the runoffs when the rain intensity reaches to 1.36 mm/h, i.e. the runoffs begin to converge with the duration of 440 min,and the maximum intercept runoff amounts is 224319.14 m3 .关键词
塘西河/分流制排水系统/城市雨水径流/初期冲刷/M(V)曲线/巢湖流域Key words
Tangxi River/separate storm sewer system/urban stormwater runoff/first flush/M( V) curve/Chaohu Catchment引用本文复制引用
周峰,曹明明,柯凡,张浏,冯慕华,李文朝..巢湖流域塘西河上游分流制系统降雨径流污染特征及初期冲刷效应[J].湖泊科学,2017,29(2):285-296,12.基金项目
国家水体污染控制与治理科技重大专项(2012ZX07103)资助. （2012ZX07103）
