Hossin Badibarzin; Mhamood Hashemi tabar; S.Mehdi Hossini
Abstract
Since agricultural sector is the largest consumer of water, it is crucial to introduce effective policies to manage water resources in this sector. In the present study, the economic analysis of allocation and pricing of irrigation water on cropping pattern and water demand management in Sistan plain ...
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Since agricultural sector is the largest consumer of water, it is crucial to introduce effective policies to manage water resources in this sector. In the present study, the economic analysis of allocation and pricing of irrigation water on cropping pattern and water demand management in Sistan plain was investigated by use of a positive mathematical programming model (PMP). In this regard, an economic modeling system including a state wide agricultural production model (SWAP) was used. The GAMS software version 24.1 was used to solve the proposed modeling system. The results showed that the use of pricing and allocation policies for irrigation water led to a decrease in the total area of designated cropping products and a reduction in the farm gross margins in Sistan plain. However, the aforementioned policies resulted in savings of 4.594 to 46.256 and 7.123 to 29.484 million cubic meters of water consumed in the region as a result of applying allocation and pricing, respectively. Decrease in total area of cultivation of selected crops under different scenarios of irrigation water quotas policy, especially higher economical crops such as watermelon, melon, and onion. Total gross yield of Sistani farmers would be reduced from 1425694 to 1292677 million Rials, reducing the gross profit by 2.17% to 9.33% in the region's agricultural pattern. Thus, applying the policy of water allocation could save about 30 million cubic meters of water available to farmers. Compared to pricing policy, the use of water allocation policy is recommended due to its superior effect on preserving water resources in the Sistan plain.
mohammad norozian; seyed mehdi hosseini; Ahmad Akbari
Abstract
Presently, the country has a problem of water scarcity, therefore, development of alternative approaches with operational capabilities can be considered as a matter of utmost importance. In this study, using comparative advantage indexes (i.e. domestic resource cost (DRC), social cost benefit ratio (SCB) ...
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Presently, the country has a problem of water scarcity, therefore, development of alternative approaches with operational capabilities can be considered as a matter of utmost importance. In this study, using comparative advantage indexes (i.e. domestic resource cost (DRC), social cost benefit ratio (SCB) and net social profit (NSP)), the ranking of crops and adaptation of products with limited water resources and current cropping pattern with comparative advantage patterns in the district of Kashmar were studied. Then, by analyzing the cost of consuming water input at the rate of 15%, 35% and 60%, the sensitivity analysis of this input was analyzed. Agricultural and trade data were collected from the Ministry of Agriculture Jihad and the Customs, respectively, in the years 2016-2017. After determining the optimal values of the indices, the results showed that saffron and grapes had comparative advantage with both free market and official exchange rates, while wheat and barley had a comparative advantage only in the official exchange rate. Also, the sensitivity analysis of water input showed that comparative advantage and product ranking varied in the three different scenarios (15%, 35% and 60%). Finally in order to adapt the comparative advantages of the products with the region's conditions, enhancement of support and implementation of suitable research and promotion plans were suggested.