Articles | Volume 30, issue 14
https://doi.org/10.5194/hess-30-4457-2026
https://doi.org/10.5194/hess-30-4457-2026
Research article
 | 
17 Jul 2026
Research article |  | 17 Jul 2026

Capturing the extremes: a quasi-comonotonicity-based algorithm for disaggregating daily to hourly rainfall

Carlos Correa, Alfonso Hernanz, Iván San-Felipe, and Esteban Rodríguez-Guisado

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Cited articles

Abdellatif, M., Kuchling, P., Rüdiger, B., and Ventura, I.: Wasserstein distance in terms of the comonotonicity copula, Stochastics, 1–12, https://doi.org/10.1080/17442508.2024.2427734, 2024. 
Alzahrani, F., Seidou, O., and Alodah, A.: Assessing the performance of daily to subdaily temporal disaggregation methods for the IDF curve generation under climate change, J. Water Clim. Change, 14, 1339–1357, https://doi.org/10.2166/wcc.2023.507, 2023. 
Bhattacharyya, D. and Saha, U.: Deep learning application for disaggregation of rainfall with emphasis on preservation of extreme rainfall characteristics for Indian monsoon conditions, Stoch. Env. Res. Risk A., 37, 1021–1038, https://doi.org/10.1007/s00477-022-02331-x, 2023. 
Bhattacharyya, D., Deka, P., and Saha, U.: Applicability of statistical and deep-learning models for rainfall disaggregation at metropolitan stations in India, J. Hydrol. Reg. Stud., 51, 101616, https://doi.org/10.1016/j.ejrh.2023.101616, 2024. 
Biswas, P. and Saha, U.: Disaggregation of rainfall from daily to 1 h scale through integrated MMRC-copula modelling, J. Hydrol., 647, 132338, https://doi.org/10.1016/j.jhydrol.2024.132338, 2025. 
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Short summary
Heavy rainfall over short periods can cause floods and damage in cities, yet rainfall is often only measured daily. We developed a new method to generate realistic hourly rainfall data from daily values, using information from many weather stations in Spain and the United States. Our approach reproduces extreme rainfall more accurately than existing methods, helping to improve flood risk studies, infrastructure design, and climate impact assessments.
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