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Effect of dynamically varying zone-based hedging policies on the operational performance of surface water reservoirs during climate change

View ORCID ProfileAdebayo J. Adeloye and Bankaru-Swamy Soundharajan
Geological Society, London, Special Publications, 488, 277-289, 17 December 2018, https://doi.org/10.1144/SP488.1
Adebayo J. Adeloye
Institute for Infrastructure and Environment, Heriot-Watt University, Edinburgh EH14 4AS, UK
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Bankaru-Swamy Soundharajan
Department of Civil Engineering, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Coimbatore 641112, India
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Abstract

Hedging is universally recognized as a useful operational practice in surface water reservoirs to temporally redistribute water supplies and thereby avoid large, crippling water shortages. When based on the zones of available water in storage, hedging has traditionally involved a static rationing (i.e. supply to demand) ratio. However, given the usual seasonality of reservoir inflows, it is also possible that hedging could be dynamic with seasonally varying rationing ratios. This study examined the effect of static and dynamic hedging policies on the performance of the Pong reservoir in India during a period of climate change. The results show that the reservoir vulnerability was unacceptably high (≥60%) without hedging and that this vulnerability further deteriorated as the catchment became drier due to projected climate change. The time- and volume-based reliabilities were acceptable. The introduction of static hedging drastically reduced the vulnerability to <25%, although the hedging reduction in the water supplied during normal operational conditions was only 17%. Further analyses with dynamic hedging provided only modest improvements in vulnerability. The significance of this study is its demonstration of the effectiveness of hedging in offsetting the impact of water shortages caused by climate change and the fact that static hedging can match more complex dynamic hedging policies.

  • © 2018 The Author(s). Published by The Geological Society of London. All rights reserved
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Geological Society, London, Special Publications: 488 (1)
Geological Society, London, Special Publications
Volume 488
2019
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Effect of dynamically varying zone-based hedging policies on the operational performance of surface water reservoirs during climate change

Adebayo J. Adeloye and Bankaru-Swamy Soundharajan
Geological Society, London, Special Publications, 488, 277-289, 17 December 2018, https://doi.org/10.1144/SP488.1
Adebayo J. Adeloye
Institute for Infrastructure and Environment, Heriot-Watt University, Edinburgh EH14 4AS, UK
  • Find this author on Google Scholar
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  • ORCID record for Adebayo J. Adeloye
  • For correspondence: a.j.adeloye@hw.ac.uk
Bankaru-Swamy Soundharajan
Department of Civil Engineering, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Coimbatore 641112, India
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Effect of dynamically varying zone-based hedging policies on the operational performance of surface water reservoirs during climate change

Adebayo J. Adeloye and Bankaru-Swamy Soundharajan
Geological Society, London, Special Publications, 488, 277-289, 17 December 2018, https://doi.org/10.1144/SP488.1
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