2014—2018年大连市大沙河水质时空变化特征分析  

Temporal and spatial variation characteristics of water quality in Dashahe River of in Dalian from 2014 to 2018

作　　者：原晖 YUAN Hui(Dalian Hydrographic Bureau of Liaoning Province,Dalian 116023,China)

机构地区：[1]辽宁省大连水文局,辽宁大连116023

出　　处：《水资源开发与管理》2020年第6期29-33,共5页Water Resources Development and Management

摘　　要：大沙河是大连市重要的供水水源,承担着向大连市城镇居民提供生活及工农业用水的任务,其水质影响着大连市经济的发展以及居民的生活,因此分析其水质状况至关重要。本文根据大沙河流域2014—2018年的水质监测数据,分析了大沙河流域近年来主要污染物以及富营养化指数的时空变化特征。结果显示:近年来大沙河流域的高锰酸盐指数、氨氮、总磷以及总氮的浓度均呈显著减小趋势,中游浓度偏高;富营养化指数在时间维度上亦呈减小趋势,中游富营养化程度略高于上、下游。研究结果可为大沙河中游的水污染治理提供数据支撑。Dashahe,as an important water supply source in Dalian,carries the life of urban residents and water for industry and agriculture in Dalian.Its water quality affects the economic development of Dalian and the life of residents.Therefore,it is very important to analyze its water quality.Based on the water quality monitoring data of Dashahe River basin from 2014 to 2018,this paper analyzes the temporal and spatial variation characteristics of major pollutants and eutrophication index in Dashahe River basin in recent years.The results show that in recent years,the permanganate index,ammonia nitrogen,total phosphorus and total nitrogen concentrations in the Dashahe River basin all showed a significant decreasing trend,while the concentration in the middle reaches was relatively high.Eutrophication index also showed a decreasing trend in the time dimension,and the degree of eutrophication in the middle reaches was slightly higher than that in the upper and lower reaches.The research results can provide data support for the urgency of water pollution control in the middle reaches of Dashahe River.

关 键 词：大沙河 水质 污染物 富营养化指数 

分 类 号：X824[环境科学与工程—环境工程]