(GRICULTURAL WATER DEMAND SITUATION IN IRAN (AT A GLANCE

From hydrological point of view, Iran is divided into 6 main drainage basins and potential harvestable surface water resources are estimate at 117 billion m3. Economically and technically usable surface water amounts annually to 86 billion m3 Nearly 50.5 billion m3 of water obtained from the precipitation in high mountainous region along with precipitation in plains is used for recharge of aquifers. Due to the drastic growing of water consumption the variation of ground water balance indicate obviously a rapid decreasing of 5 up to 6 billions m3 and the surface flow infiltration has declined from 13.2 billions m3 per year. In the agricultural sectors the water allocation and supply is arranged by the regional sectors of ministry of energy, but it agriculture sector leads management on demand, consumption optimization and on-farm. In addition, an autonomous organization as sponsor and supporter observers and supervise the environmental issues. With respect to long term water resources development, supreme water council with consumer sectors participation performs demand & supply conjoint management, which required funds, will be provided through general financial resources, leading to establish of hydraulic structures such as dams, ponds, irrigation networks, etc. and the ministry of energy & ministry of Jihad-H Agriculture are accountable for performance of supreme water council policies. In Iran was not accomplished any study on agricultural water demand, so agricultural water demand is estimated consider to irrigation land farm & water efficiency in this investigation. Due to international challenges, facing the limitations of new fresh water supply, the government urged highly the optimization and productivity enhancement this substantial vital stuff. Regarding to long term development strategies of water resources, water supreme council with cooperation of public consumer foundations relating to coincides supply & demand management in water supply put into effect, which finally required founds should be provide through general (financial) resources to perform divers hydraulic structures whereas ministry of energy is in charge for water supreme council policies execution.