Articles | Volume 385
https://doi.org/10.5194/piahs-385-117-2024
https://doi.org/10.5194/piahs-385-117-2024
Post-conference publication
 | 
18 Apr 2024
Post-conference publication |  | 18 Apr 2024

Mitigating Drought Financial Risk for Water Supply Sector through Index-Based Insurance Contracts

Gabriela C. Gesualdo, Marcos R. Benso, Fabrício A. R. Navarro, Luis M. Castillo, and Eduardo M. Mendiondo

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Cited articles

Agência Nacional de Águas e Saneamento Básico (ANA): Conjuntura dos recursos hídricos no Brasil 2017: relatório pleno, ANA, Brasília, http://www.snirh.gov.br/portal/snirh/centrais-de-conteudos/conjuntura-dos-recursos-hidricos/relatorio-conjuntura-2017.pdf/view (last access: 31 May 2022), 2017 (in Portuguese). 
Aubuchon, C. P. and Morley, K. M.: The economic value of water: Providing confidence and context to FEMA's methodology, J. Homel. Secur. Emerg., 10, 245–265, https://doi.org/10.1515/JHSEM-2012-0081, 2013. 
Baum, R., Characklis, G. W., and Serre, M. L.: Effects of Geographic Diversification on Risk Pooling to Mitigate Drought-Related Financial Losses for Water Utilities, Water Resour. Res., 54, 2561–2579, https://doi.org/10.1002/2017WR021468, 2018. 
Brunner, M. I. and Gilleland, E.: Stochastic simulation of streamflow and spatial extremes: a continuous, wavelet-based approach, Hydrol. Earth Syst. Sci., 24, 3967–3982, https://doi.org/10.5194/hess-24-3967-2020, 2020. 
Denaro, S., Castelletti, A., Giuliani, M., and Characklis, G.: Insurance Portfolio Diversification Through Bundling for Competing Agents Exposed to Uncorrelated Drought and Flood Risks, Water Resour. Res., 56, e2019WR026443, https://doi.org/10.1029/2019WR026443, 2020. 
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Short summary
We simulated indexed insurance for a water utility responsible for providing water to 7.2 million people in a metropolitan region. According to our findings, an annual amount (premium) of USD 0.43, 0.87, and 1.73 should be charged per person to obtain drought coverage for three, six, and twelve months. The premium fee can be implemented in the water bills as a new strategy to pool the risk between the supplied users and the utility, to prevent them from being exposed to surcharge fluctuations.