Evaluation and Sensitivity Analysis of Furrow Irrigation in Potato Cultivation using SIRMOD Software

Surface irrigation models are tools for evaluating and designing surface irrigation methods. Using it, all stages of complete irrigation can be simulated and designed, and by changing the input factors, which are in fact design factors, a high-efficiency system can be achieved. The purpose of this study is to investigate the parameters of the infiltration equation, the depth of infiltrated water in the field, and the field evaluation parameters including water use efficiency in the field, percentage of runoff losses, uniformity efficiency, and deep infiltration by SIRMOD software. In this study, first, the required data were collected from the farm located in Kaboudar Ahang plain of Tasaran village with field measurements, then the existing models in SIRMOD software were evaluated and simulated which includes hydrodynamic model, zero-inertia, and kinematic wave. The results showed that the data estimated by the model were consistent with the advanced time data observed in the field. The best simulation results for infiltrated volume were predicted with an average error of 5.5%, and runoff volume was predicted with an average error of 0.8%. In general, based on the results of this study, the SIRMOD software has performed a good simulation of the furrow irrigation system.