Articles | Volume 389
https://doi.org/10.5194/piahs-389-55-2026
https://doi.org/10.5194/piahs-389-55-2026
Post-conference publication
 | 
16 Sep 2026
Post-conference publication |  | 16 Sep 2026

Temporal variability of extreme precipitation in Cotonou: stable climate signal and worsening urban flood impacts

Ninette Alceste Tollo, Audace A. V. Dossou-Olory, and Inès Oyédé

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Cited articles

Adeloye, A. J. and Rustum, R.: Lagos (Nigeria) flooding and influence of urban planning, Proc. Inst. Civ. Eng. Urban Des. Plan., 164, 175–187, https://doi.org/10.1680/udap.1000014, 2011. 
Amoako, C. and Inkoom, D. K. B.: The production of flood vulnerability in Accra, Ghana: re-thinking flooding and informal urbanisation, Urban Stud., 55, 2903–2922, https://doi.org/10.1177/0042098016686526, 2018. 
Atègbo, J. M., Ahouanvoedo, O. D., and Odoulami, L.: Analyse des facteurs de vulnérabilité aux inondations dans la ville de Cotonou (Bénin), Revue de Géographie Tropicale et d'Environnement, 2, 64–78, 2020. 
Azagoun, V. C., Amoussou, E., Boko, M., and Yabi, I.: Dynamique urbaine et vulnérabilité aux inondations dans le Grand Cotonou (Bénin), Revue Espace, Territoires, Sociétés et Santé, 7, 115–132, 2024. 
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Short summary
Flooding is getting worse in Cotonou despite stable rainfall. Over 40 years of data show that extreme rain events have not increased. Instead, rapid urbanization – more buildings, less green space, overloaded drains – is the main cause. This finding shifts the focus from climate to city planning as the key solution to reduce flood risk.
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