Hydrology and Earth System Sciences
Hydrology and Earth System Sciences
HESS
Articles | Volume 30, issue 3
Articles | Volume 30, issue 3
https://doi.org/10.5194/hess-30-573-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-30-573-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 30, issue 3
Research article
 | 
03 Feb 2026
Research article |  | 03 Feb 2026

Mechanisms and scenarios of the unprecedent flooding event in South Brazil 2024

Leonardo Laipelt, Fernando Mainardi Fan, Rodrigo Cauduro Dias de Paiva, Matheus Sampaio Medeiros, Walter Collischonn, and Anderson Ruhoff

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Short summary
This study presents the first detailed hydrodynamic assessment of the May 2024 floods in southern Brazil. The model accurately reproduced flood levels and extent, validated with in situ and satellite observations. Results indicate limited effectiveness of proposed hydraulic interventions, highlighting constraints of structural solutions. The findings improve understanding of complex river–estuary–lagoon dynamics and support better planning for future extreme floods under climate change.
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