Agricultural Water Management Approach through the Technique of Virtual Water Genetic Optimization (GA) (Case study: Birjand plain)

Iran''s influential role in intensifying water scarcity water crisis¡ especially in arid and semi arid plains such as Birjand¡ South Khorasan province is¡ that only by relying on groundwater resources to agricultural production occurs. In this study by groundwater balance modeling¡ the required equations for estimating fluctuations of the water table levels have been determined; Then the objective function based on the concept of virtual water is the function Stewart¡ was created. Then¡ because too many variables in the objective function in the optimization ofwater use¡ using heuristic and intelligent Genetics (GA) which requires fewer calculations than the other methods are more efficient¡ optimized crop pattern and density studies Plains 4 the scenario was set. Results showed areas of crops cultivation were not optimized and water use in agriculture is not appropriate to thecircumstances of Birjand plain. Given those results the best answer among of the scenarios is the fourth scenario¡because profitability not only has increased 4times¡ but also reduces the amount of water to approximately 8%.