Document Type : Original Article
Department of water engineering and hydraulic structures, Ayatollah Ozma Borujerdi University, Borujerd, Iran.
Ph.D. candidate in Civil Engineering, Water and Hydraulic Structures, University of Qom, Qom, Iran.
Assistant Professor, Hydraulic Structure, Department of Civil Engineering, Faculty of Engineering, University of Ayatollah ozma Borujerdi, Borujerd, Iran.
Department of civil engineering, Imam Hossein University, Tehran, Iran.
Today, Metaheuristic Algorithms are considered as one of the most important and appropriate methods to achieve good solutions and optimization. In this research, a Particle swarm optimization (PSO) algorithm with a nonlinear objective function has been used to solve the problem of optimizing the reservoir water allocation of the Eyvashan earth dam based on the reservoir water balance for irrigation periods (2014-2020). The results show that the highest agricultural demand downstream of the dam in June was 8.96 (MCM). The amount of reservoir release calculated by the model to meet the water requirement downstream of the dam (37.80MCM) is much more optimal than the total amount of downstream needs (41.03MCM). Also, the minimum amount of water shortage due to severe drought while controlling floods is easily possible due to the useful volume of the reservoir and the annual flow of the reservoir. According to the PSO model, in each period of operation of Eyvashan earth dam, about 7.9% can be saved in the reservoir release for the needs of downstream agriculture in the months of high water consumption in summer.