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Study on Watershed Ecological Water Replenishment Coupling Hydrodynamic and Reservoir Operation

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Abstract

In order to develop an ecological operation strategy that combines cross-basin water transfer and reservoir ecological management, this study investigates the corresponding theoretical framework and methodological approach. A novel optimization model that couples hydrodynamic with reservoir dispatch for ecological water replenishment is proposed. Using the Yongding River ecological operation project as a case study, various scenarios of Yellow River water diversion are analyzed to assess the satisfaction of ecological water demands and associated costs in the downstream channel of the Guanting Reservoir. The results show that: 1) For ideal ecological flow process, suitable ecological flow process, and minimum ecological flow process in the downstream river channel of Guanting Reservoir, the minimum values are 8.67 m3/s, 4.46 m3/s, and 1.66 m3/s respectively, and the maximum values are 49.82 m3/s, 33.69 m3/s, and 8.37 m3/s respectively. 2) The coupling model is applied to the ecological water replenishment project of Yongding River and achieves satisfying effects. The ecological guarantee degree can be increased by 48.8% when the cost of water replenishment is doubled and the Yellow River water is used for ecological water replenishment. 3) According to the water storage situation of Guanting Reservoir, the satisfaction of ecological water demand and the cost of water replenishment are comprehensively considered. In order to ensure the water supply of the Beijing section of Yongding River, two ecological water supply schemes are recommended, and the ecological guarantee degree of the two schemes can reach more than 90%. The research results provide new ideas and methods for the development of ecological water replenishment programs for Yongding River in the future, and also have important reference value for the development of ecological water replenishment programs for other water-scarce rivers.

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Data Availability

The dataset on which this paper is based is too large to be retained or publicly archived with available resources. Documentation and data used to support this study are available from hydrological station data.

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Funding

This work was supported by the National Key R&D Program of China (2022YFC3202300), the National Natural Science Foundation of China (52179025, 51879213), the Basic Research Plan of Natural Science of Shaanxi Province of China (2019JLM-52, 2021JLM-44).

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Authors and Affiliations

  1. State Key Laboratory of Eco-Hydraulics in Northwest Arid Region of China, Xi’an University of Technology, Xi’an, 710048, Shaanxi, China

    Tao Bai, Yu Kang & Dong Liu

  2. Pearl River Water Resources Research Institute, Guangzhou, 510611, China

    Shaojie Gou

Authors
  1. Tao Bai
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  2. Yu Kang
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  3. Dong Liu
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  4. Shaojie Gou
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Contributions

Tao Bai: Conceptualization, Methodology, Software, Writing—original draft, Writing—review & editing. Yu Kang: Conceptualization, Writing—review & editing, Project administration. Dong Liu: Methodology, Supervision. Shaojie Gou: Resources, Validation, Investigation, Data curation.

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Correspondence to Dong Liu.

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Bai, T., Kang, Y., Liu, D. et al. Study on Watershed Ecological Water Replenishment Coupling Hydrodynamic and Reservoir Operation. Water Resour Manage 38, 3071–3092 (2024). https://doi.org/10.1007/s11269-024-03805-z

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