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Calculation of Connectivity Between Surface and Underground Three-Dimensional Water Systems in the Luan River Basin

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Listed:
  • Jingyao Wang

    (School of Civil Engineering, State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation, Tianjin University, Tianjin 300350, China)

  • Zhixiong Tang

    (School of Civil Engineering, State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation, Tianjin University, Tianjin 300350, China
    China Construction Third Engineering Bureau Co., Ltd., Wuhan 430074, China)

  • Belay Z. Abate

    (School of Civil Engineering, State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation, Tianjin University, Tianjin 300350, China
    These authors contributed equally to this paper.)

  • Zhuoxun Wu

    (Guizhou Yuneng Investment Co., Ltd., Guiyang 550081, China)

  • Li He

    (School of Civil Engineering, State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation, Tianjin University, Tianjin 300350, China
    These authors contributed equally to this paper.)

Abstract

While water conservancy projects continuously enhance flood control and resource allocation capabilities, the adverse impacts on basin systems, particularly the structural disruption of surface water–groundwater continuity, have become increasingly pronounced. Therefore, establishing quantitative assessment of water system connectivity as a critical foundation for optimizing spatial water distribution, maintaining ecohydrological equilibrium, and enhancing flood–drought regulation efficacy is important. Focusing on the regulated reaches of the Panjiakou, Daheiting, and Taolinkou reservoirs in the Luan River Basin, this study established and integrated a three-dimensional assessment framework that synthesizes hydrological processes, hydraulic structural effects, and human activities as three fundamental drivers, and employed the Analytic Hierarchy Process (AHP) to develop a quantitative connectivity evaluation system. Results indicate that water conservancy projects significantly altered basin connectivity: surface water connectivity decreased by 0.40, while groundwater connectivity experienced a minor reduction (0.25) primarily through reservoir seepage. Consequently, the integrated surface–groundwater system declined by 0.39. Critically, project scale governs surface connectivity attenuation intensity, which substantially exceeds impacts on groundwater systems. The comprehensive assessment system developed in this study provides theoretical and methodological support for diagnosing river connectivity, formulating ecological restoration strategies, and protecting basin ecosystems.

Suggested Citation

  • Jingyao Wang & Zhixiong Tang & Belay Z. Abate & Zhuoxun Wu & Li He, 2025. "Calculation of Connectivity Between Surface and Underground Three-Dimensional Water Systems in the Luan River Basin," Sustainability, MDPI, vol. 17(15), pages 1-19, July.
    • Handle: RePEc:gam:jsusta:v:17:y:2025:i:15:p:6913-:d:1713175
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    References listed on IDEAS

    as
    1. Cundong Xu & Zihao Ren & Song Huang & Jiaming Li & Yahui Zi & Xiaomeng Hu, 2023. "Simulation Study on the Impact of Water Flow Regulation Based on the MIKE 21 Model in a River Water Environment," Sustainability, MDPI, vol. 15(13), pages 1-20, June.
    2. Xinlei Xu & Siyuan Wang & Gege Yan & Xinyi He, 2023. "Ecological Security Assessment Based on the “Importance–Sensitivity–Connectivity” Index and Pattern Construction: A Case Study of Xiliu Ditch in the Yellow River Basin, China," Land, MDPI, vol. 12(7), pages 1-23, June.
    3. Li Li & Julia L. A. Knapp & Anna Lintern & G.-H. Crystal Ng & Julia Perdrial & Pamela L. Sullivan & Wei Zhi, 2024. "River water quality shaped by land–river connectivity in a changing climate," Nature Climate Change, Nature, vol. 14(3), pages 225-237, March.
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