Application of interactive interval linear programming for optimal water and crop area allocation considering virtual water content and socio-economic factors (Case study: Dorudzan-Korbal Plain)

Document Type : Research Article

Authors

1 PhD Candidate in Watershed Sciences & Engineering, Hormozgan University, Bandar-Abbas, Iran

2 Assistant Professor, Department of Watershed Sciences & Engineering, Hormozgan University, Bandar-Abbas, Iran

3 Assistant Professor, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran

4 Professor, Faculty of Environment, University of Tehran, Tehran, Iran.

Abstract

One of the key issues in the practical planning for water resources is the existence of uncertain factors. One of the approaches for decision making under such circumstances is interval programming. The current study aims to develop an interactive optimization model for water and crop area allocation. The developed model consists of four objectives that take into account socio-economic factors, the virtual water content of crops, and meeting environmental water requirements. For solving the model, four crop area scenarios (assumptions) were considered. Results showed that by raising the level of satisfaction threshold on the constraints, the amount of water allocated to each water user is declined. So that from the satisfaction level of 0.65 to the level of complete satisfaction, the model allocates only the minimum amount of water (40 MCM) to meet the environmental water needs. Based on considered scenarios for solving the model, the largest cultivation areas are allocated to wheat and maize for autumn and spring cultivations, respectively. Solving the model in the absence of upper bound for crop areas revealed that the greatest difference between optimal crop area and the highest cultivation area belong to rice with 2777 and 5821.6 hectares in Dorudzan and Korbal districts, respectively. The main advantage of the developed model in the present study is the linear formulation as well as its ability to deal with uncertain parameters. Outcomes of the model provide information required for the assessment of risk and reliability of planning options for water allocation.

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References

منابع

 
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Iranian journal of Ecohydrology
Volume 4, Issue 2
June 2017
Pages 601-613

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History

  • Receive Date: 22 November 2016
  • Revise Date: 27 February 2017
  • Accept Date: 15 March 2017

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