Optimal Implementation of Climate Change Adaptation Measures to Ensure Long-term Sustainability on Large Irrigation Systems

David Haro-Monteagudo (), Leticia Palazón, Christos Zoumides and Santiago Beguería
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David Haro-Monteagudo: University of Aberdeen
Leticia Palazón: Consejo Superior de Investigaciones Científicas (EEAD-CSIC)
Christos Zoumides: The Cyprus Institute
Santiago Beguería: Consejo Superior de Investigaciones Científicas (EEAD-CSIC)

Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), 2023, vol. 37, issue 8, No 2, 2909-2924

Abstract: Abstract Observed and projected consequences of climate change on streamflow generated in the Pyrenees threatens the long-term sustainability of water resources systems downstream, especially those with high irrigation demands. To tackle this challenge, the participation of stakeholders in defining potential adaptation strategies is crucial to building awareness and capacity for the community, providing agreed solutions, and reducing conflict. However, there is also a need for a top-down approach to incorporate other, large-scale, or innovative adaptation strategies. This article describes a bottom-up-meets-top-down approach to estimate the optimal implementation intensity of adaptation strategies under different climate scenarios on a complex water resources system. Future streamflow projections were used in a water allocation model combined with a Markov Chain Monte Carlo sampling process to obtain optimal combinations of measures to meet different sustainability objectives. The methodology was applied to the Gállego-Cinca River system in NE Spain, which relies on water from the Pyrenees. A stakeholder workshop identified storage development and irrigation modernisation as the preferred adaptation options. However, the modelling results show that more storage in the basin, especially on-farm reservoirs, is not enough to maintain current sustainability levels. This will enable the adoption of demand management measures that optimise water use despite not being among stakeholder preferences.

Keywords: Pyrenees; GCM/RCM; Aquatool; On-farm reservoirs; Demand management (search for similar items in EconPapers)
Date: 2023
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DOI: 10.1007/s11269-022-03225-x

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