Larger phosphorus flux triggered by smaller tributary watersheds in a river reservoir system after dam construction

doi:10.1016/j.jhydrol.2021.126819

	Larger phosphorus flux triggered by smaller tributary watersheds in a river reservoir system after dam construction
	Chen, Shibo 2; Chen, Lei 2; Gao, Yang 1; Guo, Jinsong 3; Li, Leifang 2; Shen, Zhenyao 2
刊名	JOURNAL OF HYDROLOGY
	2021-10-01
卷号	601 页码:11
关键词	Phosphorus flux Retention effects Three Gorges Reservoir Region Tributary watershed Eutrophication
ISSN号	0022-1694
DOI	10.1016/j.jhydrol.2021.126819
通讯作者	Shen, Zhenyao(zyshen@bnu.edu.cn)
英文摘要	Water 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.
资助项目	National 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
WOS关键词	3 GORGES RESERVOIR ; NONPOINT-SOURCE POLLUTION ; GREAT-LAKES ; ECOSYSTEM SERVICES ; SWAT MODEL ; QUALITY ; NITROGEN ; SEDIMENT ; MISSISSIPPI ; INDICATORS
WOS研究方向	Engineering ; Geology ; Water Resources
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000695816300099
资助机构	National Natural Science Foundation of China ; Newton Fund ; Interdiscipline Research Funds of Beijing Normal University
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/165631]
专题	中国科学院地理科学与资源研究所
通讯作者	Shen, Zhenyao
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 2.Beijing Normal Univ, Sch Environm, State Key Lab Water Environm Simulat, Beijing 100875, Peoples R China 3.Chongqing Univ, Key Lab Three Gorges Reservoir Reg Ecoenvironm, Minist Educ, Chongqing 400045, Peoples R China
推荐引用方式 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.