Skip to main content

Advertisement

Log in

Assessing the unexpectedness of a very large observed rainfall event in the metropolitan region of Belo Horizonte, Brazil

  • Original Paper
  • Published:
Natural Hazards Aims and scope Submit manuscript

Abstract

Exceptionally large realizations of hydrometeorological variables summarize our knowledge on the underlying processes under extreme conditions. However, the formal probabilistic modeling of record-breaking precipitation and flooding events has received limited attention from researchers and practitioners, particularly with respect to estimation of the future behavior of the variable of interest once a large magnitude event is observed. This paper discusses the use of the two-parameter Rayleigh distribution for describing the dynamics of record-breaking precipitation events, as well as predicting the distributions of future realizations of the process, on the basis of the theory of records. The main motivation for this study was an unprecedented precipitation event which accumulated 186 mm in 3 h—almost twice the previous record—and caused severe damage in the city of Belo Horizonte, in the Brazilian state of Minas Gerais. Our results suggested that, before observing this large magnitude event, the evolution of record-breaking precipitation amounts is properly captured by the model. However, this exceptional event was severely underestimated during prediction—the model estimate was more than 80 mm smaller than the observed rainfall amount. On the other hand, the inclusion of this event in inference entailed a lack of fit of the model and strongly disrupted the dynamics of previous record events, which further highlighted the difficulties of dealing with such unexpected large observations of hydrometeorological variables even under theoretically sound mathematical frameworks.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4

Similar content being viewed by others

References

Download references

Acknowledgements

The authors acknowledge the support to this research from CAPES (“Coordenação de Aperfeiçoamento de Pessoal de Nível Superior”) and CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico). The authors also wish to acknowledge the editors, an anonymous reviewer and Dr. Theano Iliopoulou for the valuable comments and suggestions, which greatly helped improving the paper.

Funding

This work was supported by Coordenação de Aperfeiçoamento de Pessoal de Nível Superior–Brazil (CAPES) and CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico).

Author information

Authors and Affiliations

Authors

Contributions

All authors contributed to the study conception and design. The first draft of the manuscript was written by VAFC and WSF and all authors commented on it. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Wilson Fernandes.

Ethics declarations

Conflict of interest

The authors have no relevant financial or non-financial interests to disclose.

Additional information

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Costa, V., Sampaio, J., Fernandes, W. et al. Assessing the unexpectedness of a very large observed rainfall event in the metropolitan region of Belo Horizonte, Brazil. Nat Hazards 120, 3979–3994 (2024). https://doi.org/10.1007/s11069-023-06369-0

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11069-023-06369-0

Keywords

Navigation