A multi-objective optimization model for agricultural water resources based on fuzzy optimal selection and credibility
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Abstract:
Many economic, social and ecological problems in arid and semi-arid watersheds can be attributed to the scarcity and mismanagement of water resources. Therefore, it is extremely important to seek effective water resources management methods. In this research, a multi-objective fuzzy credibility programming (MFCP) model was developed for supporting agricultural water resources management. This model can conduct fuzzy optimal selection of the comprehensive benefits of the decision-making variables by quantitatively analyzing the weights of different objectives in agricultural development. It can also deal with fuzzy parameters based on the fuzzy credibility theory. The MFCP model was applied to Minqin County in Wuwei city , Gansu province. An optimization model for water resources was established with economic, ecological, and social benefits as the objectives, with the water and land resources endowment as physical restraints. Results showed that the comprehensive benefits of this region could be optimized by reducing the planting area of corns and sunflowers and increasing the area of melons and vegetables. Compared with the actual situation in 2015, the optimized scheme could save 12.6% water resources and increase economic revenue by 13.8% , while reducing the total planting area by 11.1% .
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