首页|Attribution analysis of groundwater level fluctuation in the Xinxiang section of the Lower Yellow River's suspended river after the construction of the Xiaolangdi Reservoir

Attribution analysis of groundwater level fluctuation in the Xinxiang section of the Lower Yellow River's suspended river after the construction of the Xiaolangdi Reservoir

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The clear identification and quantification of the factors affecting groundwater sys-tems is crucial for protecting groundwater resources and ensuring safety in agricultural pro-duction.The Lower Yellow River(LYR)is a suspended river that replenishes groundwater continuously due to clear differences in the water head,especially in the Xinxiang section.Since its construction,the Xiaolangdi Reservoir has reversed the LYR's deposition.To accu-rately determine the factors influencing the groundwater level(GWL),the study area was divided into five subzones based on hydrogeology.A dynamic factor model(DFM),variational mode decomposition(VMD),and a multiple linear regression model were used to identify and quantify the factors influencing the GWL.The impact of the suspended river on the ground-water before and after the construction of the Xiaolangdi Reservoir was examined.The re-sults show that:(1)The rate of decrease in the GWL was 8.53 × 10-4 m/month,and the rate of decrease in the Yellow River water level(RWL)was 4.63 × 10-4 m/month.(2)Mountain front recharge(MFR)(scale=3 months)and precipitation(scale=9 months)were the dominant factors in subzones Ⅰ and Ⅱ,accounting for more than 40％of the fluctuation in the GWL.Subzone Ⅲ was dominated by exploitation(scale=7 months)and precipitation(scale=12 months),accounting for 28.43％,and 23.44％of changes in the GWL,respectively.In sub-zone Ⅳ,agricultural irrigation(scale=12 months)was the major factor,accounting for 32.47％of GWL changes,while in subzone Ⅴ,the RWL(scale=12 months)accounted for 52.52％of these changes.(3)The Xiaolangdi Reservoir has increased the lateral seepage of the suspended river and altered the inter-annual distribution.The results of this study can provide a valuable reference for controlling groundwater overexploitation and ensuring water supply security.

groundwater levelinfluencing factordynamic factor analysisXiaolangdi ReservoirLower Yellow Riverlateral seepage of the Yellow River

LI He、PING Jianhua、LENG Wei、MEI Xuemei、ZHANG Min、LIU Jiaqi

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School of Water Conservancy and Transportation,Zhengzhou University,Zhengzhou 450001,China

College of Ecology and Environment,Zhengzhou University,Zhengzhou 450001,China

Geothermal and Ecological Geology Research Center,Zhengzhou University,Zhengzhou 450001,China

Institute of Geology and Geophysics,CAS,Beijing 100101,China

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Foundation of Highlevel Talents of Zhengzhou UniversityFoundation of Highlevel Talents of Zhengzhou UniversityFoundation of Highlevel Talents of Zhengzhou UniversityProject of the Ecological Environment Monitoring and Safety Center of Henan Province

13432340370134-32340364135-32340122SJCAQ-HT-2023-036

2024

10.1007/s11442-024-2251-x

地理学报(英文版)
中国地理学会,中国科学院地理科学与资源研究所

地理学报(英文版)

CSTPCD
影响因子：1.307
ISSN：1009-637X
年,卷(期)：2024.34(7)
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