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Article

Solution Selection from a Pareto Optimal Set of Multi-Objective Reservoir Operation via Clustering Operation Processes and Objective Values

1
State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China
2
College of Resources and Environment, Yangtze University, Wuhan 430100, China
*
Author to whom correspondence should be addressed.
Academic Editor: Thomas M. Missimer
Water 2021, 13(8), 1046; https://doi.org/10.3390/w13081046
Received: 7 March 2021 / Revised: 6 April 2021 / Accepted: 8 April 2021 / Published: 10 April 2021
(This article belongs to the Section Water Resources Management, Policy and Governance)
Multi-objective evolutionary algorithms (MOEAs) are widely used to optimize multi-purpose reservoir operations. Considering that most outcomes of MOEAs are Pareto optimal sets with a large number of incomparable solutions, it is not a trivial task for decision-makers (DMs) to select a compromise solution for application purposes. Due to the increasing popularity of data-driven decision-making, we introduce a clustering-based decision-making method into the multi-objective reservoir operation optimization problem. Traditionally, solution selection has been conducted based on trade-off ranking in objective space, and solution characteristics in decision space have been ignored. In our work, reservoir operation processes were innovatively clustered into groups with unique properties in decision space, and the trade-off surfaces were analyzed via clustering in objective space. To attain a suitable performance, a new similarity measure, referred to as the Mei–Wang fluctuation similarity measure (MWFSM), was tailored to reservoir operation processes. This method describes time series in terms of both their shape and quantitative variation. Then, a compromise solution was selected via the joint use of two clustering results. A case study of the Three Gorges cascade reservoirs system under small and medium floods was investigated to verify the applicability of the proposed method. The results revealed that the MWFSM effectively distinguishes reservoir operation processes. Two more operation patterns with similar positions but different shapes were identified via MWFSM when compared with Euclidean distance and the dynamic time warping method. Furthermore, the proposed method decreased the selection range from the whole Pareto optimal set to a set containing relatively few solutions. Finally, a compromise solution was selected. View Full-Text
Keywords: multi-objective reservoir optimization; Pareto optimal set analysis; similarity measure; data-driven decision-making; cluster analysis multi-objective reservoir optimization; Pareto optimal set analysis; similarity measure; data-driven decision-making; cluster analysis
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MDPI and ACS Style

Kong, Y.; Mei, Y.; Wang, X.; Ben, Y. Solution Selection from a Pareto Optimal Set of Multi-Objective Reservoir Operation via Clustering Operation Processes and Objective Values. Water 2021, 13, 1046. https://doi.org/10.3390/w13081046

AMA Style

Kong Y, Mei Y, Wang X, Ben Y. Solution Selection from a Pareto Optimal Set of Multi-Objective Reservoir Operation via Clustering Operation Processes and Objective Values. Water. 2021; 13(8):1046. https://doi.org/10.3390/w13081046

Chicago/Turabian Style

Kong, Yanjun; Mei, Yadong; Wang, Xianxun; Ben, Yue. 2021. "Solution Selection from a Pareto Optimal Set of Multi-Objective Reservoir Operation via Clustering Operation Processes and Objective Values" Water 13, no. 8: 1046. https://doi.org/10.3390/w13081046

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