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Coupling effects of hydrological characteristics and nutrient load in sediments on the trophic state of reservoirs

Acta Geochimica 2021年第4期40卷 640-649页

作者： Fan Xinyi Yue Yihong Mei Lin Li Xiaoying Hu Zhehui Luo Jiajie Liu Liu Wang Fushun School of Environmental and Chemical Engineering Shanghai UniversityNo.99Shangda RoadBaoshan 200444ShanghaiChina

Currently,lakes and artificial reservoirs are increasingly threatened by eutrophication,which is the result of the combined action of many natural and anthropogenic *** the past,the effect of nutrient load on the trophic state of water bodies has attracted much attention,while few studies have addressed the effect of hydrological ***,to reveal the coupling effects of hydrological characteristics and nutrient load in sediments on the trophic state of water bodies,this study collected relevant data from 36 lakes and reservoirs across *** correlation analysis showed that trophic level index was positively and significantly correlated with nutrient load in sediments and hydraulic retention time,while it was negatively correlated with mean depth and hydraulic *** principal component analysis showed that the nutrient load was the first major component that influenced the trophic state of water bodies,followed by the mean depth and hydraulic retention *** was prone to occur in water bodies with mean depth less than 7 m and hydraulic retention time greater than 14 d,and the trophic level index regression equation with hydrological characteristics and nutrient load in sediments was derived by multiple regression *** study revealed that the trophic state of water bodies influenced by both nutrient load and hydrological *** provides a new idea to reduce the occurrence of eutrophication in reservoirs by using the artificial hydrological regulation capacity of reservoirs.

关键词： artificial reservoirs Hydrological characteristics Nutrient load Trophic state of water bodies

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