Determine Values the Influence of Water in Irrigation Furrows with Using Models SIRMOD and HYDRUS2-D

One of the main problems is the influence of surface water irrigation and non-uniform soil moisture profile below the soil surface which reduces the efficiency In this simulation، it was to influence both the water and irrigation. For this purpose، the surface flow equations and the equation of Nantes and the water in the porous medium equation to be done Rychadz Then، using the influence of surface irrigation was sirmod Simulation the flow of irrigation water and Results showed the model to solve the equation hydrus Rychadz error is less The accuracy of numerical simulations based on Richards equation for solving the given number of observations and comparison with moisture in the soil profiles developed in hydrus wet volume was evaluated RMSE hydrus results compared with observational values are)RMSE =0 / 11) and R2=. /92 in different depth Was achieved. The model also estimates hydrus appropriate volume of water to furrows adjacent furrows in the soil moisture distribution can be well simulated.