大连市水库型水源地水质评价及污染特征分析  

Water Quality Evaluation and Pollution Characteristics Analysis of Reservoir Type Water Source Areas in Dalian City

作　　者：胡岚岚 贾刚 张连宇 Hu Lanlan;Jia Gang;Zhang Lianyu(Dalian Ecological Environmental Monitoring Center of Liaoning Province,Dalian 116023,Liaoning,China)

机构地区：[1]辽宁省大连生态环境监测中心,辽宁大连116023

出　　处：《绿色科技》2024年第12期64-70,共7页Journal of Green Science and Technology

基　　金：辽宁省生态环境厅2022年辽宁省生态环境科研计划项目(编号:辽环科字(2023)第042号)。

摘　　要：A水库位于辽宁省,是一处具有防洪、供水等多重功能的水利设施。近年来,水库面临内源沉积和外源污染导致的水质问题。2021-2022年的水质监测结果表明,A水库整体水质以清洁和较清洁为主,各水期存在季节性变化,丰水期水质相对较差。空间分布上,库区大部分点位的综合污染指数低于0.4,水质良好,而上游点位污染程度较高,特别是D002点位,指数高达0.70,反映出上游污染的显著影响。营养状态分析表明,水库以中营养为主,综合营养状态指数(TLI)在40.86~51.93。从水期来看丰水期的营养水平略高,TLI均值为50.1。相关性分析揭示了水深对污染和营养状态的影响,尤其在丰水期和平水期更为显著。为保护水质,建议加强上游污染源头控制,提升污水处理能力,减少农业面源污染。同时,通过水源保护区规划和生态扩容工程,增强水库生态功能和水源生态系统完整性,确保饮用水安全,促进区域可持续发展。Reservoir A,located in Liaoning Province,is a water conservancy facility with multiple functions such as flood control and water supply.In recent years,reservoirs are facing water quality problems caused by internal deposition and external pollution.The monitoring results of water quality from 2021 to 2022 show that the overall water quality of reservoir A is mainly clean and relatively clean.There are seasonal changes in each water period,and the water quality is relatively poor in the wet season.In terms of spatial distribution,the comprehensive pollution index of most points in the reservoir area is lower than 0.4,and the water quality is good,while the pollution degree of upstream points is higher.Especially the D002 point,the index is as high as 0.70,reflecting significant impact of upstream pollution.The analysis of nutrient state showed that the reservoir was mainly medium nutrient,and the comprehensive nutrient state index(TLI)ranged from 40.86 to 51.93.From the perspective of water period,the nutrient level was slightly higher in wet period,and the average TLI was 50.1.The correlation analysis revealed the influence of water depth on pollution and nutrient status,especially in wet and normal water periods.In order to protect water quality,it is recommended to strengthen upstream pollution source control,improve sewage treatment capacity,and reduce agricultural non-point source pollution.At the same time,through the planning of water source protection areas and ecological expansion projects,the ecological functions of reservoirs and the integrity of water source ecosystems are enhanced,drinking water safety is ensured,and regional sustainable development is promoted.

关 键 词：水库 富营养化 时空分布 

分 类 号：X52[环境科学与工程—环境工程]