Simulation of Consumption Water Scarcity Effect in Agriculture

Models are the best methods to select most efficient irrigation method that would lead to high performance and yield response. In this research, the effect of Consumption Water Scarcity in Bilasuvar plain on the north-west of Iran has been simulated on Wheat and Corn crops using Budget soil and water balance model. By choosing the product, minimum and seasonal methods with different time steps has been calibrated for the observation years and amount of yield is estimated. Result of the statistical analysis shows that choosing the product method with 10 day time periods provides the best simulation using potential evapotranspiration with amounts in R2 of 0.98, RMSE of 78% and an EF of 0.83 that between observed and simulated data of Wheat and amount in R2 of 0.87, RMSE of 7.4% and an EF of 0.83 of Corn. later water consumption graphs, performance for each statistic period under different irrigation strategies have been drawn. Results demonstrates significant impact of rainfall amount, water consumption management and water tension in both crops during the middle stage of its growth compared to there stages of growth including first and final stage. This important fact must be considered for planning the water deficit irrigation schedule.