عنوان مقاله [English]
Agricultureas one of the maintopics of development hasan important role in economic development. To achieve agricultural development, its transformation and modernization is inevitable. In terms of groundwater level, the most plains of our country are in the critical and dangerous conditions because of unsuitable spatial and temporal distribution of rainfall, incorrect management policies regarding the use of surface runoff and groundwater over exploitation. In this study, the effect of management approaches including modification of crop pattern and upgrading of irrigation efficiency from 37 to 55 percentage in the form of a management model was discussed on the Fariman-Torbat Jam balancing groundwater resources (6355 km2), in the field scale. This management model based on three scenariosin the form of linear programming was coded and implementedin MATLAB software. The results showed that although theactions of each of these management approaches has stopped the declination of groundwater level, however, the lack of the aquifer which is about 215 million cubic meters will not compensate completely. Also the results showed that upgrading of irrigation efficiency and modification of crop pattern will compensate the lack of the aquifer about 200 and 88 million cubic meters, respectively. Simultaneous application of these approaches not only completely will compensate the lack of the aquifer at the end of ten years management period, but also it saves about 45 million cubic meters of water in this plain. Although this model has good result son water resources management, how ever, it is necessary to study of its effect son employment and income of farmers, separately.