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Optimizing Operation Rules of Cascade Reservoirs for Adapting Climate Change

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Abstract

Climate change leads to great impact on hydrological cycle and consequently affects water resources management. Historical strategies are no longer applicable under a changing environment. Therefore, adaptive management, especially adaptive operation rules for reservoirs, has been developed to mitigate the potential adverse impacts of climate change. However, previous studies generally provide a similar framework for adaptation strategies of individual reservoir without consideration of cascade reservoirs in the future scenario. This study derives adapting operation rules for cascade reservoir system based on future projections (2021–2100) of two global climate change models (GCMs). By using Pareto archived dynamically dimensioned search (PA-DDS) algorithm with maximization of water supply and power generation, the performance of the adaptive operation rule curves is compared with the designed operation rule. The results demonstrate that Pareto solutions of the PA-DDS algorithm provide a wider, more optimal range of annual power generation and water supply, and the projection pursuit method can select the best. The adaptive operation rules focusing on power generation can significantly increase the cascade reservoir annual power generation (by 3.7% in GCM-BCC or 4.8% in GCM-BNU), which shows that the proposed method can adapt future climate change.

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Acknowledgements

This study is financially supported by the National Natural Science Foundation (Grant NO. 51539009 and 91647106) and China Scholarship Council (CSC). We are very grateful to the editors and the anonymous reviewers for their valuable comments and constructive suggestions that helped us to greatly improve the manuscript. We also appreciate Hassan Mhando, a researcher fellow in IHE Delft, the Nertherlands, for his careful proof-reading and grammar check.

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Correspondence to Shenglian Guo.

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He, S., Guo, S., Yang, G. et al. Optimizing Operation Rules of Cascade Reservoirs for Adapting Climate Change. Water Resour Manage 34, 101–120 (2020). https://doi.org/10.1007/s11269-019-02405-6

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  • DOI: https://doi.org/10.1007/s11269-019-02405-6

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