摘要
为探究兴隆河水环境污染问题,基于河流7个水质自动站数据,运用综合水质指数(W_(WQI))法进行水质时空分析,评价跨界流域水质整体状况,并通过回归分析识别重点参数,构建和筛选出最优最小水质指数(W_(WQI)_(min))模型。结果表明,兴隆河流域全年整体水质为“良好”,平均W_(WQI)指数为74.17,但存在显著季节性差异,四季中夏季水质最差,其最低值为65.63;水质空间变化存在显著差异,其中,上游水质最差,三庙河汇入处水质较好,而兴隆河干流沿岸乡镇生活污水和农田是流域水质恶化的重要污染源;兴隆河流域W_(WQI)_(min)模型由NH_(3)-N、DO、TP、COD_(Mn)共4项关键参数构成,该模型的决定系数R2、百分比误差PPE分别为0.857、3.24%。综合水质指数法可作为该跨界流域水质评价工作的重要工具。
In order to investigate water pollution problem of Xinglong River,based on the data of 7 automatic water quality stations in the basin,comprehensive water quality index method(W_(WQI))was adopted to conduct spatio-temporal analysis of water quality,and the overall water quality of the basin was evaluated.The regression analysis was made to i-dentify the key parameters,and optimal minimum water quality index model(W_(WQI)_(min))was screened out.The results show that the annual overall water quality of the Xinglong River Basin is good with an average W_(WQI) of 74.17,but there are significant seasonal difference and the worst one is in summer,whose lowest value is 65.63.There are significant differences in the spatial variation of water quality.The water quality of the upstream water is the worst,and the water quality at the confluence of the Sanmiao River is better,while the towns and farmlands along the main stream of the Xin-glong River are important pollution sources for the deterioration of water quality of the basin.The W_(WQI)_(min)model of Xin-glong River Basin involves 4 key parameters of NH_(3)-N,DO,TP,and COD_(Mn),and the values of coefficient of determina-tion(R2)and the percentage error(PPE)are 0.857 and 3.24%,respectively.The water quality index method can be used as an important tool for water quality evaluation in this basin.
作者
王博
徐宜雪
郑淋峰
任春坪
WANG Bo;XU Yi-xue;ZHENG Lin-feng;REN Chun-ping(Sichuan Academy of Environmental Policy and Planning,Chengdu 610096,China)
出处
《水电能源科学》
北大核心
2025年第12期48-52,共5页
Water Resources and Power
基金
四川省科技重点研发项目(2023YFS0379,2024YFNH0006)
四川省科技计划项目(2022JDR0350)。
关键词
水质时空分析
综合水质指数
系统聚类分析
线性回归
兴隆河流域
spatial-temporal analysis of water quality
comprehensive water quality index
systematic cluster analy-sis
linear regression
Xinglong River Basin
