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| DOI：10.13522/j.cnki.ggps.2025244 |
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| Beneficial reservoir operations and water withdrawal compensation in arid regions: A case study of the Ertanggou Reservoir |
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PAN Jinda, YAN Dianyi, MA Sichao, LIANG Ke, XU Zhixia, XU Wei, YANG Qin
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1. State Key Laboratory of Water Cycle and Water Security, China Institute of Water Resources and Hydropower Research,
Beijing 100038, China; 2. Shenyang Agricultural University, College of Water Conservancy, Shenyang 110866, China;
3. Science and Technology Research Institute, China Three Gorges Corporation, Beijing 101199, China
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| Abstract: |
| 【Objective】The Turpan Basin in Northwestern China is an arid region with extremely low rainfall and high evaporation, resulting in severe water scarcity. Using the Ertanggou Reservoir as an example, this paper evaluates the beneficial reservoir operations and provides a scientific basis for optimizing water allocation and ensuring regional water supply security.【Method】Long-term inflow data for the Ertanggou Reservoir were reconstructed using hydrological data infilling techniques. Integrating reservoir inflow and sectoral water demand, beneficial reservoir operation computations were conducted under two streamflow frequencies: P=85% and P=95%, and two scenarios: the current base year and a planning year. Compensatory mechanisms for new water withdrawals and intersectoral allocation strategies were analyzed for both scenarios.【Result】①Under the 85% streamflow frequency, the reservoir met the full water demand for all sectors in both scenarios. ②Under the 95% streamflow frequency, increased industrial water demand resulted in deficits in agricultural supply and ecological base flow. ③In the planning scenario, implementing water allocation compensation measures, including high- efficiency water conservation, market-based water rights trading, and multi-stakeholder coordination, effectively reduced conflicts in water demand among different sectors.【Conclusion】Quantifying reservoir regulation benefits enables rational allocation of the scarce water resources in arid regions. As industrial water demand increases, developing and implementing water withdrawal compensation plans can mitigate intersectoral water conflicts and improve overall water use efficiency. |
| Key words: Ertanggou reservoir; profiting regulation calculation; runoff series extension and interpolation; water withdrawal compensation; arid region water resources |
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