Determination of the best situation of border irrigation for increasing application Efficiency using SRFR model

Due to this fact that irrigation management and border dimensions are traditionally used in Hamidieh region, measurements in recent condition showed that, application efficiency in Hamidieh plain is low and around 30 %. Therefore, providing solutions such as determining the length and width of the border, inflow rate and also determining the appropriate irrigation time will have an important role for increasing water application efficiency in this area. Therefore using appropriate simulation models like SRFR that can consider all important parameters related to surface irrigation improvement, has high importance. In this investigation, slope, Infiltration and border dimensions were measured in Hamidieh region. Using measured data, the SRFR4.1.3 model was calibrated. The variation of water application efficiency regarding to border dimensions, inflow rate and irrigation timing using SRFR model were evaluated. Results showed that with this slope (0.2%), the length of the border 180 m, the border width equal to 10 m, the discharge between 15 to 18 liter per second, and the irrigation time equal to 3 to 3.5 hours, the water application efficiency can be increased by 40 to 45 percent. This result is very important for reducing irrigation losses and optimizes water consumption.