长江科学院院报2026，Vol.43Issue(1)：191-201,209,12.DOI:10.11988/ckyyb.20250064
封江口水库营养状态及其影响因素分析
Nutrient Status and Its Influencing Factors in Fengjiangkou Reservoir
摘要
Abstract
[Objective]Identifying the main areas and driving factors of eutrophication in Fengjiangkou Reservoir can provide guidance for water quality protection in the online regulation reservoir of the water resource allocation project in northern Hubei Province.[Methods]Taking Fengjiangkou Reservoir as the study area,water quality monitoring and meteorological and hydrological data collection were conducted.The comprehensive nutrient status index method and the partial least squares regression method were used to analyze the spatiotemporal variation char-acteristics of nutrient status in Fengjiangkou Reservoir and its influencing factors.[Results]There were significant spatiotemporal differences in indicators such as permanganate index,ammonia nitrogen,total phosphorus,total ni-trogen,and chlorophyll-a.These indicators were higher during the irrigation period than during other periods,and higher in the estuary areas of the Fengjiangkou River and Shahedian River than in other waters,making them the key periods and water areas for pollutant control in Fengjiangkou Reservoir.In the estuary area of Fengjiangkou Riv-er,chlorophyll-a concentration was significantly positively correlated with TN concentration(P=0.02),TP con-centration(P=0.05),and diffuse radiation(P=0.04).In the estuary area of the Shahedian River,chlorophyll-a concentration was significantly positively correlated with TN concentration(P=0.02)and TP concentration(P=0.02),indicating that TN concentration,TP concentration,and diffuse radiation intensity might be the main fac-tors affecting the nutrient status in the estuary area of Fengjiangkou River,while TN concentration and TP concen-tration were the main factors affecting the nutrient status in the estuary area of Shahedian River.Although indicators such as air temperature and wind speed showed no significant correlation with chlorophyll-a concentration,each in-dicator exhibited a clear correlation with chlorophyll-a concentration under given conditions.During the irrigation period,the nutrient status of the Fengjiangkou River and Shahedian River estuary areas was mildly eutrophic.Con-tribution analysis results showed that permanganate index(20.6％),total nitrogen(11.0％),and nitrogen-to-phos-phorus ratio(9.3％)were the main water quality indicators affecting eutrophication in the estuary area of Fengjiangkou River,while total phosphorus(15.6％),ammonia nitrogen(12.3％),pH(10.1％),and total nitro-gen(8.3％)were the main water quality indicators affecting eutrophication in the estuary area of Shahedian River.Both normal radiation and diffuse radiation contributed over 10％to the occurrence and decline of eutrophication in the estuaries of Fengjiangkou River and Shahedian River,making them the main meteorological driving factors of eutrophication in Fengjiangkou Reservoir.[Conclusion]To synergistically ensure the water quality safety in Fengjiangkou Reservoir,recommendations are proposed,including reducing watershed non-point source pollution during the irrigation period,regulating algal biomass in the reservoir bay,and implementing water environment mo-nitoring and intelligent management.关键词
富营养化/风险防控/综合营养状态指数法/偏最小二乘回归法/引调水工程/在线调节水库Key words
eutrophication/risk prevention and control/comprehensive nutrient status index/partial least squares regression/water diversion project/online regulation of reservoir分类
天文与地球科学引用本文复制引用
肖洋,吴贞晖,陈诺,王中敏,翟红娟,宋宏炎,李俊辉,徐恩奎..封江口水库营养状态及其影响因素分析[J].长江科学院院报,2026,43(1):191-201,209,12.基金项目
国家自然科学基金项目(52109005) （52109005）
