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Larger phosphorus flux triggered by smaller tributary watersheds in a river reservoir system after dam construction
Chen, Shibo1; Chen, Lei1; Gao, Yang2; Guo, Jinsong3; Li, Leifang1; Shen, Zhenyao1
2021-10-01
Source PublicationJOURNAL OF HYDROLOGY
ISSN0022-1694
Volume601Pages:11
Corresponding AuthorShen, Zhenyao(zyshen@bnu.edu.cn)
AbstractWater level fluctuation and modification in human activities induced by dam construction have significantly affected the production and input of nutrients in the tributary watersheds. In this study, numerical simulation and time series analysis methods are used to explore the input of phosphorus (P) in different types of tributary watersheds around the reservoirs in river reservoir systems and the impact of dam construction on reservoir water quality. Watersheds within a reservoir were divided into larger and smaller tributary watersheds according to whether their area was greater than or less than 1000 km(2). The results showed that smaller tributary watersheds, which account for 29% of the area of the Three Gorges Reservoir Region (TGRR), transported approximately 36%similar to 45% of P and 43.7%similar to 47.8% of sediment deposited into the mainstream from 2003 to 2017. P from the smaller tributary watersheds of the reservoir had a stronger influence on the aquatic environment of the river-reservoir system than that from the larger tributary watersheds. In addition, the annual mean contributions of the P inputs from the "three rivers" (the Yangtze River, the Jialingjiang River and the Wujiang River) and tributary watersheds within the reservoir were 68.76% and 31.18% from 2003 to 2017, respectively. The dam altered the composition of the form of P in the river-reservoir system, and the waterbody close to the dam was identified as the main area containing dissolved P (DP) enrichment. Accordingly, the risk of eutrophication remains high in head area of the dam due to the relatively high and stable P concentration. This study provides critical information for the management of nutrients in a river-reservoir system and the prevention of eutrophication of water bodies.
KeywordPhosphorus flux Retention effects Three Gorges Reservoir Region Tributary watershed Eutrophication
DOI10.1016/j.jhydrol.2021.126819
WOS Keyword3 GORGES RESERVOIR ; NONPOINT-SOURCE POLLUTION ; GREAT-LAKES ; ECOSYSTEM SERVICES ; SWAT MODEL ; QUALITY ; NITROGEN ; SEDIMENT ; MISSISSIPPI ; INDICATORS
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51579011] ; National Natural Science Foundation of China[51779010] ; Newton Fund[BB/N013484/1] ; Interdiscipline Research Funds of Beijing Normal University
Funding OrganizationNational Natural Science Foundation of China ; Newton Fund ; Interdiscipline Research Funds of Beijing Normal University
WOS Research AreaEngineering ; Geology ; Water Resources
WOS SubjectEngineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS IDWOS:000695816300099
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/165632
Collection中国科学院地理科学与资源研究所
Corresponding AuthorShen, Zhenyao
Affiliation1.Beijing Normal Univ, Sch Environm, State Key Lab Water Environm Simulat, Beijing 100875, Peoples R China
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
3.Chongqing Univ, Key Lab Three Gorges Reservoir Reg Ecoenvironm, Minist Educ, Chongqing 400045, Peoples R China
Recommended Citation
GB/T 7714
Chen, Shibo,Chen, Lei,Gao, Yang,et al. Larger phosphorus flux triggered by smaller tributary watersheds in a river reservoir system after dam construction[J]. JOURNAL OF HYDROLOGY,2021,601:11.
APA Chen, Shibo,Chen, Lei,Gao, Yang,Guo, Jinsong,Li, Leifang,&Shen, Zhenyao.(2021).Larger phosphorus flux triggered by smaller tributary watersheds in a river reservoir system after dam construction.JOURNAL OF HYDROLOGY,601,11.
MLA Chen, Shibo,et al."Larger phosphorus flux triggered by smaller tributary watersheds in a river reservoir system after dam construction".JOURNAL OF HYDROLOGY 601(2021):11.
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