摘要
河流水质受人类活动和自然因素交互作用,为探究其交互作用在季风区域是否存在季节性差异,本文采用2021年官厅水库上游河流37个断面水质数据,通过构建官厅水库上游河流水质综合评价指数(WQI)反映其水质状况,利用地统计学方法分析官厅水库上游河流雨季和旱季的水质空间变异特征,采用地理探测器定量揭示不同季节河流水质影响因素.结果表明:官厅水库上游河流水质存在明显的季节性差异,旱季的水质状态优于雨季.官厅水库上游河流水质呈明显空间分异,水质参数的空间分异性在旱季更为显著,其空间异质主要由结构性因素引起.人口密度是雨季和旱季官厅水库上游河流水质空间分异的主导影响因素,任意两种影响因子的交互作用对地表水质空间分异的解释力均大于单个因子,且以双因子增强为主,官厅水库上游河流水质受自然因素和人类活动多种因素共同影响,且人类活动对官厅水库上游河流水质空间分异的影响程度在旱季大于雨季.该研究可为官厅水库上游及其他流域准确识别水质影响因素及精准提出地表水体污染防控措施提供科学参考.
The water quality of rivers is affected by human activities and natural factors.To explore whether there are seasonal differences in the interaction between these factors in the monsoon region,this study investigated water quality data from 37 sections of the upstream river of the Guanting Reservoir in 2021 to assess its water quality by constructing a comprehensive evaluation index(WQI) for the upstream river of Guanting Reservoir.Geostatistical method was used to analyze the spatial variability characteristics of water quality in the upstream river of the Guanting Reservoir in rainy and dry seasons,and geographic detector was used to quantitatively reveal the influencing factors of water quality in different seasons.The results showed that there were significant seasonal differences in water quality,with better water quality status in the dry season compared to the rainy season.The water quality of the upstream river of the Guanting Reservoir presented obvious spatial differences,and the spatial variability of water quality parameters was more significant in the dry season,primarily due to structural factors.Population density was the dominant factor affecting spatial variation of water quality in the upper reaches of the Guanting Reservoir during both seasons.The interaction of multiple factors had a greater explanatory power for spatial variation of surface water quality than a single factor.Various factors,including natural processes and human activities,contributed to the overall impact on water quality in this region.Moreover,human activities had a greater impact on the spatial variation of water quality.This study could provide a scientific reference for accurately identifying water quality influencing factors and accurately proposing surface water pollution prevention and control measures in the upstream of the Guanting Reservoir and other watersheds.
作者
程鹏
孙明东
宋晓伟
CHENG Peng;SUN Mingdong;SONG Xiaowei(College of Resources and Environment,Shanxi University of Finance and Economics,Taiyuan 030006;Institute of Water Ecology and Environment,Chinese Research Academy of Environmental Sciences,Beijing 100012)
出处
《环境科学学报》
CAS
CSCD
北大核心
2024年第5期218-227,共10页
Acta Scientiae Circumstantiae
基金
国家重点基础研究计划项目(No.2021YFC3101703)
国家自然科学基金(No.72104132)。
