Articles | Volume 30, issue 1
https://doi.org/10.5194/hess-30-91-2026
https://doi.org/10.5194/hess-30-91-2026
Research article
 | 
12 Jan 2026
Research article |  | 12 Jan 2026

Developing Intensity-Duration-Frequency (IDF) curves using sub-daily gridded and in situ datasets: characterising precipitation extremes in a drying climate

Cristóbal Soto-Escobar, Mauricio Zambrano-Bigiarini, Violeta Tolorza, and René Garreaud

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Cited articles

Abarca, R., Olivares, M., and Venegas, T.: Determinación de umbrales críticos de precipitación asociados a impactos para la zona central de Chile, Revista Stratus, https://revistastratus.meteochile.gob.cl/index.php/2024/02/21/ determinacion-de-umbrales-criticos-de-precipitacion-asociados -a-impactos-para-la-zona-central-de-chile/ (last access: 18 December 2025), 2024. a, b
Aghakouchak, A., Behrangi, A., Sorooshian, S., Hsu, K., and Amitai, E.: Evaluation of satellite-retrieved extreme precipitation rates across the central United States, J. Geophys. Res.-Atmos., 116, D02115, https://doi.org/10.1029/2010JD014741, 2011. a
Agilan, V. and Umamahesh, N. V.: Is the covariate based non-stationary rainfall IDF curve capable of encompassing future rainfall changes?, J. Hydrol., 541, 1441–1455, https://doi.org/10.1016/j.jhydrol.2016.08.052, 2016. a
Agilan, V. and Umamahesh, N. V.: Modelling nonlinear trend for developing non-stationary rainfall intensity-duration-frequency curve, Int. J. Climatol., 37, 1265–1281, https://doi.org/10.1002/joc.4774, 2017. a
Agilan, V. and Umamahesh, N. V.: Covariate and parameter uncertainty in non-stationary rainfall IDF curve, Int. J. Climatol., 38, 365–383, https://doi.org/10.1002/joc.5181, 2018. a, b
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This study assesses how spatial patterns, temporal trends, and record length in hourly precipitation data affect annual maximum intensities estimated with stationary and non-stationary models across a climatically and topographically diverse region. Comparing five gridded datasets, we find consistent spatial patterns but notable differences in intensities, with non-stationary estimates generally slightly lower.
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