广东省东风水库水质和沉积物时空特征及污染评价  

Spatiotemporal characterization of water quality and sediment and pollution risks in Dongfeng Reservoir in Guangdong Province

作　　者：肖耿锋 杜欢欢[1,2] 洪昌红 刘达[1,2] 林文圣 XIAO Gengfeng;DU Huanhuan;HONG Changhong;LIN Da;LIN Wensheng(Guangdong Research Institute of Water Resources and Hydropower,Guangzhou 510635,China;State and Local Joint Engineering Laboratory of Estuarine and Hydraulic Technology,Guangzhou 510635,China)

机构地区：[1]广东省水利水电科学研究院,广东广州510635 [2]河口水利技术国家地方联合工程实验室,广东广州510635

出　　处：《中国水利水电科学研究院学报(中英文)》2025年第1期83-92,共10页Journal of China Institute of Water Resources and Hydropower Research

基　　金：广东省科研机构稳定性支持专项资金院自设课题(221016);广东省水利科技创新项目(2024-03)。

摘　　要：为了揭示季风气候区水库饮用水源地的水质和沉积物时空特征及污染风险,以广东省云浮市东风水库为研究对象,通过现场调查和试验研究,分析水质特征的季节变化情况和沉积物营养盐的分布特征,针对水质特征采用综合营养状态指数(TLI)法和改进TOPSIS模型进行评价,并采用综合污染指数对沉积物的污染状况进行评价。结果表明:水库各监测断面TLI为36.45~49.51,营养状态均为中营养;TOPSIS评价结果显示水库水质季节性波动变化较大,丰水期初期水质出现恶化趋势;坝前和库尾综合污染指数为1.96和1.62,均为中度污染状态,水库内源氮磷污染风险较高;污染源调查分析结果表明,林业、农业种植产生的面源污染和沉积物氮磷污染物释放导致的内源污染为水库潜在污染来源。研究成果可为季风气候区饮用水源地水生态保护与修复提供参考。To elucidate the characteristics of water quality and sediments and pollution risks in drinking-water reservoirs in the monsoon regions,Dongfeng Reservoir in Yunfu City,Guangdong Province was taken as the research object.The seasonal changes and the distribution characteristics of water quality and sediment nutrients were investigated by field sampling and laboratory analysis,and the water quality characteristics were evaluated by the trophic level index(TLI)method and TOPSIS model,while the pollution status of the sediment was evaluated by the comprehensive pollution index.The results showed that the TLI of each sampling site was ranged from 36.45 to 49.51,indicating the nutrient status of the overlying water was mesotrophic;the results of TOPSIS evaluation showed that the seasonal fluctuation of water quality in the reservoir was large,and there was a trend of deterioration in the early stage of the abundant water period;the comprehensive pollution index was 1.96 and 1.62 at S1 and S3,respectively,indicating the moderate risk of nitrogen and phosphorus pollution of the reservoir’s endogenous source.The investigation and analysis of the pollution sources showed that the non-point source pollution generated by forestry and agricultural cultivation and the endogenous pollution caused by releasing nitrogen and phosphorus pollutants from the sediment were the potential pollution sources of the reservoir.The study can provide a reference for the protection and restoration of water ecology of drinking-water reservoirs in the monsoon regions.

关 键 词：水质评价 沉积物评价 面源污染 水库饮用水水源地 东风水库 

分 类 号：X824[环境科学与工程—环境工程]