Optimal Allocation of Water and Land under Conditions of Uncertainty Using WFGP Model (Case Study: the City of Hamadan)

Document Type : Research Paper

Authors

1 Phd student of Agricultural Economics, University of Sistan and Baluchestan, Zahedan, Iran.

2 Assistant Professor, Saravan Center for Higher Education, Saravan, Iran.

3 Ph.D. Student of Agricultural Economics, Payame Noor University, Tehran, Iran.

4 Agricultural Resreach Center at University of Zabol, Zabol, Iran.

Abstract

using mathematical programming models for determining appropriate cropping patterns has recently attracted a lot of attention. The agricultural sector is one of the most important and powerful economic sectors of the country. In the last ten years, its contribution to gross domestic product has been around 18% on average. The method of linear programming has been widely used in the fields of land allocation and determination of optimal cultivars since the 1960s. The purpose of linear programming is to maximize or minimize the objective function by considering a number of constraints and decision variables simultaneously. Fuzzy scheduling allows decision-makers to interfere with non-explicit data and data parameters in models. Compared to other models of math planning, it is more applicable and more flexible to be used in optimization problems and in determining the optimum crop cultivation patterns. Moreover, the results are more reliable (Rastegaripour and Sabouhi, 2009).
Mir Karimi et al. (2016) investigated the optimal cultivar pattern in the city of Amol using the ideal planning and taking into account the goals of reducing fertilizer use by seven percent. Their results showed a one-percent reduction in pesticides to protect the environment and a reduction of 93% of water use for the conservation of scarce water resources and sustainable agricultural development.
In this study, a fuzzy utopian planning model with three equal weight patterns, different weights, a decreasing weight and an incremental weight for ideals and water resource constraints are designed, taking into account environmental and economic objectives.
The main objective of this research is to optimize water and land resources in Hamadan province. First, we introduced a weighted fuzzy goal programming model (WFGP). Using this model, optimum cultivating model for farmers in Hamadan was determined, considering their income goals, environmental goals and sustainability of water resources of the region. Subsequently, the allocation between irrigation water inputs and land surface was calculated considering equal weights, different weights and different decreasing weights for the desired goals.

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References

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Irrigation Sciences and Engineering
Volume 42, Issue 2
June 2019
Pages 167-180

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History

  • Receive Date: 23 November 2016
  • Revise Date: 03 October 2017
  • Accept Date: 07 October 2017
  • Publish Date: 22 June 2019

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