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Reservoir operation using system dynamics under climate change impacts: a case study of Yamchi reservoir, Iran

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Abstract

This paper proposes a decision support system for Yamchi reservoir operation in semi-arid region of Iran. The paper consists of the following steps: Firstly, the potential impacts of climate change on the streamflow are predicted. The study then presents the projections of future changes in temperature and precipitation under A2 scenario using the LARS-WG downscaling model and under RCP2.6, RCP4.5, and RCP8.5 using the statistical downscaling model (SDSM) in the northwestern of Iran. To do so, a general circulation model of HadCM3 is downscaled by using the LARS-WG model. As a result, the average temperature, for the horizon 2030 (2011–2030), will increase by 0.77 °C and precipitation will decrease by 11 mm. Secondly, the downscaled variables are used as input to the artificial neural network to investigate the possible impact of climate change on the runoffs. Thirdly, the system dynamics model is employed to model different scenarios for reservoir operation using the Vensim software. System dynamics is an effective approach for understanding the behavior of complex systems. Simulation results demonstrate that the water shortage in different sectors (including agriculture, domestic, industry, and environmental users) will be enormously increased in the case of business-as-usual strategy. In this research, by providing innovative management strategies, including deficit irrigation, the vulnerability of reservoir operation is reduced. The methodology is evaluated by using different modeling tests which then motivates using the methodology for other arid/semi-arid regions.

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Acknowledgments

This research is supported by Ardabil Regional Water Authority and then their funding is appreciated.

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Correspondence to Nasim Safari.

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This article is part of the Topical Collection on Water Resources in Arid Areas

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Zarghami, M., Fotookian, M.R., Safari, N. et al. Reservoir operation using system dynamics under climate change impacts: a case study of Yamchi reservoir, Iran. Arab J Geosci 9, 678 (2016). https://doi.org/10.1007/s12517-016-2676-3

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  • DOI: https://doi.org/10.1007/s12517-016-2676-3

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