Hydrology and Earth System Sciences
Hydrology and Earth System Sciences
HESS
Articles | Volume 29, issue 21
Articles | Volume 29, issue 21
https://doi.org/10.5194/hess-29-6181-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-29-6181-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 29, issue 21
Research article
 | 
11 Nov 2025
Research article |  | 11 Nov 2025

Integrating historical archives and geospatial data to revise flood estimation equations for Philippine rivers

Trevor B. Hoey, Pamela Louise M. Tolentino, Esmael Guardian, John Edward G. Perez, Richard D. Williams, Richard Boothroyd, Carlos Primo C. David, and Enrico C. Paringit

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Short summary
Estimating the sizes of flood events is critical for flood risk management and other activities. We used data from several sources in a statistical analysis of flood sizes for rivers in the Philippines. Flood size is mainly controlled by the size of the river catchment, along with the volume of rainfall. Other factors, such as land use, appear to play only minor roles in flood size. The results can be used to estimate flood size for any river in the country, alongside other local information.
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