water economics value estimation in wheat product in qazvin plain irrigation network: a dual approach

abstract some issues such as dehydration, local and chronological disproportion of rainfall, low productivity of water in agricultural sector, increasing demand for agricultural products due to increase in population participate with doughtiness are the most challenges of agricultural water. these factors caused water to be as one of the important and scarce inputs is agricultural products. therefore, proper management of water demand and any attempt to saving water consumption, lead to develop of irrigated cultivation and to decrease of environmental consequences due to it’s over consumption. on of the methods in water resource’s management is determination of economic value of agricultural water from consumer’s point view. the main propose of this study is to determine the economic value of agricultural water in wheat production by using both production and dual cost functions in qazvin plain’s irrigation network in 2007-8 crop year. results revealed that the economical value of water is 609 and 586 rials for cubic meter based on the estimated production and cost functions, respectively.