Stable isotope signatures of river and lake water from Poyang Lake, China: Implications for river-lake interactions

doi:10.1016/j.jhydrol.2020.125619

IEECAS OpenIR > 古环境研究室

	Stable isotope signatures of river and lake water from Poyang Lake, China: Implications for river-lake interactions
	Wu, Huawu 1,2; Huang, Qi 3; Fu, Congsheng 1; Song, Fan 4; Liu, Jinzhao 2; Li, Jing 5
通讯作者	Fu, Congsheng(csfu@niglas.ac.cn) ; Li, Jing(xiaofengxue86@163.com)
	2021
发表期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
卷号	592 页码:10
摘要	Interactions between the Yangtze River and Poyang Lake are undergoing rapid changes due to intensive human activities and ongoing climate change. This study investigates the spatiotemporal variations of isotopic compositions (delta H-2 and delta O-18) in river and lake water to explore the river-lake interactions in combination with water level and discharge in Poyang Lake watershed. The results showed that river and lake water isotopes (delta H-2 and delta O-18) exhibited highly temporal heterogeneity across seasons but their spatial differences were not remarkable, which is closely related with water sources from local precipitation and groundwater, and lake hydrology. The homogeneous patterns of lake water delta H-2 and delta O-18 indicated that Poyang Lake is a well-mixed lake in spatial scales. By contrast, the river (10.7 parts per thousand) and lake (10.8 parts per thousand) water d-excess and lc-excess (0.6 parts per thousand) were close to precipitation d-excess and lc-excess suggesting that precipitation is the main source for the lake and river. The slope and intercept of the river water line were slightly lower than those of the local meteoric water line and lake water line, which could be attributed to a greater evaporative enrichment in river water impacted by water flow regulation in the watershed. Interactions between Poyang Lake and Yangtze River vary seasonally, as evidently shown by the variations of water discharge and isotope compositions in river and lake water. The delta H-2 and delta O-18 of the Yangtze River water become more positive in the downstream zone than those in the upstream zone, indicating that the water from Poyang Lake has a great impact on downstream river water. This result can also be demonstrated by the efflux rate from the Poyang Lake to the Yangtze River, ranging from 17.9 parts per thousand to 67.9 parts per thousand across seasons except for the outlier rate in October resulted from the backflow of water from Yangtze River to the Poyang Lake. The complex lake-river interactions between Poyang Lake and Yangtze River mainly resulted from the regulation of Three Gorges Dam and water discharge from Poyang Lake watershed. These findings of the complex lake-river interactions will help to improve understanding of the hydrological processes and transport of pollutants and solutes around the confluence zone of the Yangtze River and Poyang Lake.
关键词	Stable isotopes Backflow River-lake interactions Yangtze River Poyang Lake
DOI	10.1016/j.jhydrol.2020.125619
关键词[WOS]	CHANGJIANG YANGTZE RIVER ; 3 GORGES DAM ; TEMPORAL VARIABILITY ; SPATIAL-DISTRIBUTION ; SEASONAL-VARIATION ; FLOODPLAIN LAKE ; SURFACE WATERS ; PRECIPITATION ; BALANCE ; BASIN
收录类别	SCI ; SCI
语种	英语
资助项目	National Natural Science Foundation of China[41701036] ; National Natural Science Foundation of China[42071145] ; National Natural Science Foundation of China[41861022] ; Open fund from State Key Laboratory of Loess and Quaternary Geology[SKLLQG1926] ; Pioneer Hundred Talent Program, Chinese Academy of Sciences[Y7BR021001] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA23020102]
WOS研究方向	Engineering ; Geology ; Water Resources
项目资助者	National Natural Science Foundation of China ; Open fund from State Key Laboratory of Loess and Quaternary Geology ; Pioneer Hundred Talent Program, Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:000639844900020
出版者	ELSEVIER
引用统计	被引频次：33[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/16419
专题	古环境研究室
通讯作者	Fu, Congsheng; Li, Jing
作者单位	1.Chinese Acad Sci, Nanjing Inst Geog & Limnol, Key Lab Watershed Geog Sci, Nanjing 210008, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 3.Jiangxi Normal Univ, Sch Geog & Environm, Nanchang 330022, Jiangxi, Peoples R China 4.Minist Water Resources Peoples Republ China, Informat Ctr, Hydrol & Water Resources Monitoring & Forecasting, Beijing 10053, Peoples R China 5.Jiujiang Coll, Tourism Sch, Jiujiang 332005, Peoples R China
推荐引用方式 GB/T 7714	Wu, Huawu,Huang, Qi,Fu, Congsheng,et al. Stable isotope signatures of river and lake water from Poyang Lake, China: Implications for river-lake interactions[J]. JOURNAL OF HYDROLOGY,2021,592:10.
APA	Wu, Huawu,Huang, Qi,Fu, Congsheng,Song, Fan,Liu, Jinzhao,&Li, Jing.(2021).Stable isotope signatures of river and lake water from Poyang Lake, China: Implications for river-lake interactions.JOURNAL OF HYDROLOGY,592,10.
MLA	Wu, Huawu,et al."Stable isotope signatures of river and lake water from Poyang Lake, China: Implications for river-lake interactions".JOURNAL OF HYDROLOGY 592(2021):10.