Impacts of artificial dams on terrestrial water storage changes and the Earth's elastic load response during 1950-2016:A case study of medium and large reservoirs in Chinese mainlandOAEI
Impacts of artificial dams on terrestrial water storage changes and the Earth's elastic load response during 1950-2016:A case study of medium and large reservoirs in Chinese mainland
The construction of dams for intercepting and storing water has altered surface water distributions,land-sea water exchanges,and the load response of the solid Earth.The lack of accurate estimation of reservoir properties through the land surface and hydrological models can lead to water storage simulation and extraction errors.This impact is particularly evident in many artificial reservoirs in China.The study aims to comprehensively assess the spatiotemporal distribution and trends of water storage in medium and large reservoirs(MLRs)in Chinese mainland during 1950-2016,and to investigate the gravity,displacement,and strain effects induced by the reservoir mass concentration using the load elasticity theory.In addition,the impoundment contributions of MLRs to the relative sea level changes were assessed using a sea-level equation.The results show impoundment increases in the MLRs during 1950-2016,particularly in the Yangtze River(Changjiang)and southern basins,causing significant elastic load effects in the surrounding areas of the reservoirs and increasing the relative sea level in China's offshore.However,long-term groundwater estimation trends are overestimated and underestimated in the Yangtze River and southwestern basins,respectively,due to the neglect of the MLRs impacts or the uncertainty of the hydrological model's output(e.g.,soil moisture,etc.).The construction of MLRs may reduce the water mass input from land to the ocean,thus slowing global sea level rise.The results of the impact of human activities on the regional water cycle provide important references and data support for improving the integration of hydrological models,evaluating Earth's viscoelastic responses under long-term reservoir storage,enhancing in-situ and satellite geodetic measurements,and identifying the main factors driving sea level changes.
Linsong Wang;Mingtao Zhu;Yulong Zhong;Jianwei Sun;Zhenran Peng
Hubei Subsurface Multiscale Image Key Laboratory,School of Geophysics and Geomatics,China University of Geosciences,Wuhan 430074,China||Three Gorges Research Center for Geo-hazard,Ministry of Education,China University of Geosciences,Wuhan 430074,ChinaHubei Subsurface Multiscale Image Key Laboratory,School of Geophysics and Geomatics,China University of Geosciences,Wuhan 430074,ChinaSchool of Geography and Information Engineering,China University of Geosciences,Wuhan 430078,China
Man-made damsTerrestrial water storageElastic load responseSea level changesChinese mainland
《大地测量与地球动力学（英文版）》 2024 (003)
252-263 / 12
We thank two anonymous reviewers for their detailed,helpful and insightful comments.This work was supported by the National Natural Science Foundation of China(No.42274110 and 42374106).The reservoir data used in this study were provided by GRanD(http://globaldamwatch.org)and ICOLD(https://www.icold-cigb.org/GB/world_register/data_search.asp),while the GRACE mascon and GLDAS-NOAH data were provided by the CSR(https://www2.csr.utexas.edu/grace/RL06_mascons.html)and NASA Earth data-base(https://disc.gsfc.nasa.gov/datasets/GLDAS_NOAH025_M_2.1/),respectively.The A10 absolute gravity observation data were obtained from long-term monitoring project in the Three Gorges Reservoir area(the National Natural Science Foundation of China,No.41874090 and 41504065).The GNSS data were provided by the National Earthquake Science Data Center(Eastern Deformation Data Service,https://www.eqdsc.com/index.html).We express our gratitude to all the aforementioned organizations for providing the data used in the present work.
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