Articles | Volume 25, issue 3
https://doi.org/10.5194/nhess-25-1095-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/nhess-25-1095-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
11 Mar 2025
Research article |
| 11 Mar 2025
| 11 Mar 2025
Modelling urban stormwater drainage overflows for assessing flood hazards: application to the urban area of Dakar (Senegal)
Laurent Pascal Malang Diémé
CORRESPONDING AUTHOR
Laboratoire Leïdi “Dynamique des Territoires et Développement”, Université Gaston Berger (UGB), Saint Louis, Sénégal
IRD, UMR 5151, HSM, Univ. Montpellier, CNRS, IRD, Montpellier, France
Christophe Bouvier
IRD, UMR 5151, HSM, Univ. Montpellier, CNRS, IRD, Montpellier, France
Ansoumana Bodian
Laboratoire Leïdi “Dynamique des Territoires et Développement”, Université Gaston Berger (UGB), Saint Louis, Sénégal
Alpha Sidibé
DPGI “Direction de la Prévention et de la Gestion des Inondations au Sénégal”, MEA, Dakar, Sénégal
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Short summary
We propose a decision support tool that detect the occurrence of flooding by drainage overflow, with sufficiently short calculation times. The simulations are based on a drainage topology on 5 m grids, incorporating changes to surface flows induced by urbanization. The method can be used for flood mapping in project mode and in real time. It applies to the present situation as well as to any scenario involving climate change or urban growth.
We propose a decision support tool that detect the occurrence of flooding by drainage overflow,...
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