نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه مهندسی آبیاری و آبادانی، دانشکده کشاورزی، دانشگاه تهران، کرج، ایران.
2 استاد، گروه علوم و فناوری های محیطی، دانشکده مهندسی انرژی و منابع پایدار، دانشکدگان علوم و فناوری های میان رشته ای، دانشگاه تهران،
3 گروه مهندسی انرژی های نو و منابع پایدار،دانشکدگان علوم و فناوری های میان رشته ای،دانشگاه تهران،تهران،ایران
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
The main purpose of this article was to estimate the economic value of agricultural water resources by considering the role of water market, which has been done to investigate the role of the water market in the optimal allocation of water resources, the feasibility of setting-up and investigating the efficiency of water market, and investigating the economic dimensions of the market. Water and its effect on the interests of farmers also investigated as four main parts of this research. Also, based on information of crop year 2018-2019 and descriptive data obtained from interviews with farmers and experts on the cultivation pattern of agricultural products, the amount of available water resources, the amounts used for production inputs and water input demand function obtained. Based on the PMP model and the maximum entropy, an optimization model was coded for maximizing the profit of farmers in the presence of the water market in GAMS Software. After forming a LP Model for maximizing the regional production efficiency of farmers and solving the optimization problem,, shadow price of water input in Eshtehard plain, Iran, was obtained equal to18760 Rials/m3. By adding the possibility of water exchange to the model, the cultivation area was calculated in the presence of a water market. Results showed, the existing difference between the shadow price of water input and the selling price of water has caused a decrease in the productivity of agricultural water. The absolute values of the price elasticity of demand water input for wheat, barley and alfalfa were obtained 1.42, 1.36 and 1.35. According to the negative values of demand elasticity in the production of crops in Eshtehard plain, it can be concluded that agriculture in the region has high elasticity with respect to water Input. Therefore, the use of price policies such as the water market by affecting the amount of demand for this input by the farmers of the region will save water consumption and plant crops with less water requirement and increase the economic value of agricultural water and the total profit of farmers to the amount of 4.35%. The existence of a gap between the supply capacity and the intensity of water demand due to the limited resources and the increasing growth of water demand along with the growth of the urban population indicates the importance that this increase in water demand has created a crisis.
کلیدواژه‌ها [English]
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