Abstract

ABSTRACT INTRODUCTION province is about 145 mm and is provided 38 / 90 percent of its groundwater from wells and 98/5% and 64/3 percent, respectively, of the aqueduct and fountain. terms of water consumption, in different sectors according to Statistics, 86/95 percent of water extracted from groundwater water resources consumption is in agriculture, 34 / 3 percent of the drinking and 8/0 percent in the industrial sector. Excessive withdrawals from groundwater aquifers have many complications, including decreasing water levels in the plains of the province. Therefore adopted strategies are important to optimize water use, particularly in terms of water shortages and drought. Among the policies that help to solve this problem is limiting the amount of irrigation water available and water pricing. Background According to agriculture is the biggest consumer of water resources. Water production rate isn't responder to increasing in demand for water. Moreover, Population growth, promoting social welfare, agricultural and industrial development and protection of ecosystems is Causes by increased water demand. These factors and important role of water in sustainable development has been Caused that authorities more attention to demand management and water supply has in planning and macroeconomic policy regional and national. Kerman province with an area of 175,069 km, population of 6 / 2 million people, The elevation range of 190 meters in the Lut Desert until 4465 meters in altitude in Hezar mountain and this province is located between geographical coordinates of 54 and 59 eastern longitude and 26 and 31 north latitude. Annual rainfall in Kerman agricultural policy intervention is shifted. Based on the results of this study, reduction in the acreage of wheat and bean and increase in the expected profit of RFs are the consequences of increasing acreage of colza. But, as variance of profit increases, the net impact of policy on the expected utility of RFs is not perfectly known. The results also indicated that the use of pesticide increases through introducing colza into a cropping pattern. The effect of policy on water use is different among RFs and they can't take this policy as a water demand management policy. Cortignali and severini in 2009 Studied Irrigation water policies by positive mathematical programming model. results showed that increasing water costs do not motivate adoption of DI techniques. Rather,