NDLI: Isotopic signatures of precipitation, surface water, and groundwater interactions, Poyang Lake Basin, China

Content Provider	Springer Nature Link
Author	Zhan, Lucheng Chen, Jiansheng Zhang, Shiyin Li, Ling Huang, Dewen Wang, Tao
Copyright Year	2016
Abstract	Poyang Lake, whose hydrological characteristics are impacted by the operation of the Three Gorges Dam, is the largest freshwater lake in China. However, water cycle mechanisms in the Poyang Lake Basin remain poorly understood. In this study, stable isotopes (δD and δ$^{18}$O) of water samples (taken in April, July, and November 2013) and hydrological data are used to investigate the interactions between precipitation, river water, lake water, and shallow groundwater in the Poyang Lake region. The isotopic results show seasonal variations in precipitation, surface water, and groundwater, which provides a set of tools to identify waters that have different histories. The similar isotopic compositions of river water and groundwater suggest a close hydrological connection. Hydrological data present a positive correlation between river run-off and precipitation; however, isotopic results show that rivers in the Poyang Lake Basin in different seasons are primarily recharged by subsurface run-off with different proportion between base flow and near-surface quick flow, rather than by surface run-off directly formed by concurrent rainfall. Due to the geological characteristics of stratum in the Poyang Lake Basin, it is easier for precipitation to infiltrate into soil and recharge groundwater than to form direct surface flow that feeds rivers. The groundwater system is like a huge reservoir which can effectively impound rainfall water, playing an important role in restraining floodwater during the flood season and in ensuring river run-off supply during the dry season.
Starting Page	1
Ending Page	14
Page Count	14
File Format	PDF
ISSN	18666280
Journal	Environmental Earth Sciences
Volume Number	75
Issue Number	19
e-ISSN	18666299
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-09-30
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Poyang Lake Deuterium and oxygen-18 Precipitation Surface water Groundwater Interaction Geology Hydrology/Water Resources Geochemistry Environmental Science and Engineering Terrestrial Pollution Biogeosciences
Content Type	Text
Resource Type	Article
Subject	Global and Planetary Change Earth-Surface Processes Soil Science Environmental Chemistry Pollution Geology Water Science and Technology

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