城中村不同降雨特征下的径流污染变化规律研究
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摘要
为了探讨城中村里不同降雨特征下,路面径流的水质演变规律和污染特性,选取了深圳市某城中村,对城中村内典型雨水口进行了15场降雨的径流污染物监测,并与周边市政道路、工业区、住宅区雨水口径流水质特征进行对比。选出城中村3场典型雨型,分析排水口水质指标随时间的变化规律。研究结果表明:与其他用地区域相比,城中村的径流水质最差;城中村中,典型小雨和大雨的监测结果显示,在前期干旱天数较长的情况下,初期径流水质劣于生活污水水质,前期干旱时间长的降雨径流污染物浓度明显高于前期干旱时间短的降雨;典型大雨的降雨量和降雨强度可以使路面径流污染物浓度在短时间内快速降低。
In order to investigate the effect of rainfall characteristics on runoff pollutant concentrations in urban village, this paper selects typical urban village in Shenzhen, monitors the runoff water quality of fifteen rainfall events, and compares the road runoff pollutant concentrations from urban village with the ones from municipal, residential and industrial area, and meanwhile analyzes the water quality variation with time series in typical small, medium, and large rainfall patterns. The results indicate that runoff quality is worse with longer antecedent dry days; first flush effect is evident in heavy intensity rainfall event, while not obvious in small and medium rainfall event especially with longer antecedent dry days. When large rainfall happens, the rainfall amount and the intensity will decrease the concentration of pollution.
In order to investigate the effect of rainfall characteristics on runoff pollutant concentrations in urban village, this paper selects typical urban village in Shenzhen, monitors the runoff water quality of fifteen rainfall events, and compares the road runoff pollutant concentrations from urban village with the ones from municipal, residential and industrial area, and meanwhile analyzes the water quality variation with time series in typical small, medium, and large rainfall patterns. The results indicate that runoff quality is worse with longer antecedent dry days; first flush effect is evident in heavy intensity rainfall event, while not obvious in small and medium rainfall event especially with longer antecedent dry days. When large rainfall happens, the rainfall amount and the intensity will decrease the concentration of pollution.
引文
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[2] 刘静,张帆,杨骐华,等.上海高架道路径流污染特征及雨水资源化利用技术[J].应用技术学报,2017,17(4):304-308.
[3] 王小林,余李鑫,王旭东,等.西安市不同下垫面雨水水质分析及道路雨水利用设计[J].西安建筑科技大学学报(自然科学版),2017,49(4):555-560.
[4] 彭晓春,郑航桅,赵德骏,等.广州市中心城区初期雨水面源污染规律初探[J].广东水利水电,2015(9):40-43.
[5] 董雯,李怀恩,李家科.城市雨水径流水质演变过程监测与分析[J].环境科学,2013,34(2):561-569.
[6] 贺涛,杨乐亮,王钉,等.广州市文教区和公园区城市径流污染试验及特征分析[J].人民珠江,2014,35(3):95-98.
[7] 许浩浩,吕伟娅.透水铺装系统控制城市雨水径流研究进展[J].人民珠江,2018,39(10):29-33.
[8] 任玉芬,王效科,欧阳志云,等.沥青油毡屋面降雨径流污染物浓度历时变化研究[J].环境科学学报,2006,26(4):601-606.
[9] 李海燕,胡磊,王崇臣.道路雨水径流重金属含量测定[J].环境化学,2009(1):145-146.
[10]郭婧,马琳,史鑫源,等.北京城市道路降雨径流监测与分析[J].环境化学,2011(10):1814-1815.
[11]李倩倩,李铁龙,赵倩倩,等.天津市路面雨水径流重金属污染特征[J].生态环境学报,2011(1):143-148.
[12] 潘俊,陈昱奇,董健,等.沈阳城区雨水径流中重金属的分布特征[J].沈阳建筑大学学报(自然科学版),2015,31(4):730-736.