Hydrology and Earth System Sciences
Hydrology and Earth System Sciences
HESS
Articles | Volume 30, issue 8
Articles | Volume 30, issue 8
https://doi.org/10.5194/hess-30-2357-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-30-2357-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 30, issue 8
Research article
 | 
24 Apr 2026
Research article |  | 24 Apr 2026

Seasonal dynamics of closed shallow lakes nutrient status controlled by lacustrine groundwater discharge

Xiaoliang Sun, Yao Du, Hao Tian, Jiawen Xu, Huanhuan Shi, Yetong Liu, Yamin Deng, Yiqun Gan, and Yanxin Wang

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Short summary
This study investigated groundwater-driven nutrient fluxes in a Yangtze Basin oxbow lake using a year of high-frequency monitoring. Water level and 222Rn tracing revealed a seasonal groundwater discharge pattern. This dynamic was regulated by net precipitation, which controlled lake level fluctuations and subsequent groundwater discharge rates. Associated N and P loads varied synchronously with discharge. The N/P closely matched that of lake water and correlated with chlorophyll-a dynamics.
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