摘要
通过2014~2018年西溪河水质断面监测数据,利用平均综合污染指数法进行水质评价,分析了西溪河流域的水质情况,并采用秩相关系数法对该河流水质变化趋势进行了研究。分析了2018年西溪河流域的空间分布差异和时间变化,总结了流域水污染特征和水质变化的原因。结果表明,西溪河来水受上游城镇影响水质较差,中游水体经过自净作用有所好转,下游城区段污染上升明显。水体污染主要来自城镇生活源和上游农业面源污染,中下游农业面源及畜禽养殖污染受到了较好的抑制。
Based on the monitoring data of water quality section of Xixi River in Guangan city from 2014 to 2018, the paper evaluated the water quality using the average comprehensive pollution index method, analyzed the water quality situation of Xixi River basin, and studied the variation trend of water quality of the river by the rank correlation coefficient method. In addition, the spatial distribution and time variations of Xixi River basin in 2018 were analyzed, and the characteristics of water pollution in the basin and the causes of water quality changes were analyzed. The results show that the upstream of Xixi River is affected by the incoming water from upstream towns and the water quality was poor, the water quality of the middle reaches was better because of self-purification effect, whereas the pollution of downstream city reaches increased obviously. Water pollution mainly came from urban living sources and upstream non-point agricultural pollution, and the pollution from agricultural non-point source and livestock and poultry breeding in the middle and downstream reaches were restrained well.
作者
陈平
杨娟
CHEN Ping;YANG Juan(Guangan Environmental Monitoring Station,Guangan,Sichuan 638000, China)
出处
《四川环境》
2019年第4期56-62,共7页
Sichuan Environment
关键词
西溪河
水体污染
水质现状
平均综合污染指数
变化趋势
Xixi River
water pollution
status of water quality
average comprehensive pollution index method
variation trend
