عنوان مقاله [English]
In this research, distribution of flow in irrigation networks with the aim of optimizing the covered distance to open and close the gates for irrigation, as well as the regulation number of control gates inside distributor channel was investigated. In order to simulate the flow distribution, flow function model was used because it simulates the flow distribution by considering the existing restrictions in irrigation networks such as canal flow capacity and the operation time, there is possibility to provide optimized irrigation planning. The optimization was carried out using Genetic Algorithm and in order to verify the performance of the provided model, the flow distribution in AMX canal of Varamin Irrigation Network was simulated and the optimized value of the relevant parameters was determined. According to the results obtained from the model, it was found that to achieve optimized irrigation planning, the number of regulation gates in distributer canal could be reduced to 7, while the covered distance for opening and closing the gates, the discharge of main canal, and the operation time of the canal should be 37526 m, 1244 litre per second, and 216 respectively. Comparing the results with those provided from previous researches showed that the model presented in this research can be used as a powerful tool for modelling some functions of the flow distribution in irrigation networks.