Conventional reservoir operation emphasizes power generation (PG) with ignoring downstream river ecosystem and water supply benefits for sustainable development. Compared with the model defining water supply and ecological flow requirements as constraints, a novel long-term multi-objective scheduling model in complex parallel reservoir system (LTMOSCPRS) is developed to assess and achieve win–win and sustainable development for energy, water supply, and ecological benefits. The suitable and ideal ecological water requirements are calculated based on the requirement level index. Afterward, the novel multi-objective shuffled frog leaping algorithm (NMOSFLA) including renewed frog grouping, local search, and external elite frog set mutation strategies is proposed. Results indicate that three optimization objectives expose a mutual competing relationship. The benefit of the river ecosystem will increase at a loss of PG and water supply guarantee rate (WSGR). Therefore, the parallel reservoir system should be adjusted to improve the benefits of WSGR and ecological water spill and shortage (EWSS) with minimizing the loss of PG, simultaneously. Finally, the NMOSFLA is verified to outperform other compared methods at the solution diversity and convergence which is evaluated by multiple indicators. Overall, the NMOSFLA provides efficient reservoir operation schemes for decision-makers to select optimal trade-off schemes and feasible ways to solve the LTMOSCPRS.
Bibliographical noteFunding Information:
This work is supported by the National Natural Science Foundation of China (Grant No. 52109034); the Chinese Universities Scientific Fund (Grant Nos 2452021085 and 2452021086); Sichuan University, State Key Laboratory of Hydraulics and Mountain River Engineering (Grant No. SKHL2112); Key Laboratory of Resource Environment and Sustainable Development of Oasis, Gansu Province (Grant No. GORS202101), and the Research and Extension Project of Hydraulic Science and Technology in Shanxi Province (Grant No. 2017DSW02). The authors appreciated the insightful comments and suggestions from editors and anonymous reviewers.
© 2022 The Authors.
- ecological water requirement
- long-term multi-objective scheduling
- parallel reservoir system
- shuffled frog leaping algorithm
- water supply
ASJC Scopus subject areas
- Civil and Structural Engineering
- Water Science and Technology
- Geotechnical Engineering and Engineering Geology
- Atmospheric Science