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Heuristic Input Variable Selection in Multi-Objective Reservoir Operation

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Abstract

Deriving operating rules for multi-objective cascade reservoir systems is an important challenge in water resources management. To address, this study combines a radial basis function network with an evolutionary algorithm to propose a heuristic input variable selection (HIS) method that extracts reservoir operating rules based on feature selection. For a case study of the Hanjiang cascade reservoirs in China, we initially describe the operating rules with radial basis functions and subsequently refine them based on the HIS method. We select the most suitable input variables for each reservoir conditioned on water supply and power generation targets to derive and optimize the rules with a Pareto-archived dynamically dimensioned search algorithm. From this we can analyze input variable selection and the corresponding impact on multi-objective cascade reservoir operations. The results demonstrate that the HIS method selects the input variables accurately and the reservoir operating rules refined by the method could increase water supply by up to 6.6% and power generation by up to 1.2%. The most suitable input variables for reservoir operation vary depending on reservoir objective, however the HIS method appears effective at selecting the appropriate input variables for individual reservoirs in a cascade system.

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Acknowledgements

This study was financially supported by the National Natural Science Foundation of China (grants 51539009 and 51422907) and the National Key Research and Development Plan of China (grant 2016YFC0402206). The authors thank the editor and the anonymous reviewers for their valuable comments.

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Correspondence to Guang Yang or Shenglian Guo.

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The authors declared that they have no conflicts of interest to this work.

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Yang, G., Guo, S., Liu, P. et al. Heuristic Input Variable Selection in Multi-Objective Reservoir Operation. Water Resour Manage (2020). https://doi.org/10.1007/s11269-019-02456-9

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Keywords

  • Cascade reservoirs
  • Reservoir operating rules
  • Input variables selection
  • Radial basis function network
  • Heuristic optimization