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Optimal Design of Cascade Stilling Basins using Metaheuristic Algorithms

Golkar, Mohammad Mehdi | 2024

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 57576 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Sheikholeslami, Razi
  7. Abstract:
  8. The country's increasing demand for water makes effective dam management essential. Beyond environmental concerns, constructing new dams and their components involves relatively high costs. One of the most critical components of a dam is its spillway, which accounts for a significant portion of the total construction costs and plays a vital role in water resource management. To reduce spillway construction costs, a specific type of spillway that combines a stepped spillway with cascading basins can be employed. Designing this type of spillway can be considered as an optimization problem, requiring the use of optimization methods. Metaheuristic algorithms, which have gained significant attention in recent decades, can be applied to optimize many engineering problems. In this thesis, the optimized design of this type of spillway was addressed using four metaheuristic algorithms: Genetic Algorithm, Particle Swarm Optimization, Gradient-based Optimization, and dynamic Fitness-Distance Balance. To gain a better understanding of this subject, after conducting a case study, the results obtained from these four methods were compared with each other and then with previous studies. The comparison demonstrates a significant improvement in results, leading to a reduction in spillway construction costs. The use of these four metaheuristic algorithms reduced construction costs by an average of 72% compared to non-optimized methods. Additionally, these algorithms provided at least 13% more optimal results than the best designs presented in previous pieces of research
  9. Keywords:
  10. Optimal Design ; Optimization ; Meta Heuristic Algorithm ; Genetic Algorithm ; Particles Swarm Optimization (PSO) ; Gradient Based Method ; Dam Spillway ; Cascade Stilling Basins ; Dynamic Fitness-Distance Balance ; Price Reduction

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