[ Analyse des tendances des pluies extrêmes dans le département du Mono, République du Bénin (Afrique de l’Ouest) ]
Volume 44, Issue 3, January 2025, Pages 732–748
Modestine Victoire Bessan1, Expédit Wilfrid Vissin2, Katchele Faustin Ogou3, and Euloge Ogouwale4
1 Laboratoire Pierre Pagney Climat, Eau, Ecosystèmes et Développement (LACEEDE), Université d’Abomey-Calavi, 03 BP 1122, Jéricho, Benin
2 Laboratoire Pierre Pagney Climat, Eau, Ecosystèmes et Développement (LACEEDE), Université d’Abomey-Calavi, 03 BP 1122, Jéricho, Benin
3 Laboratory of Atmospheric Physics, Department of Physics, Faculty of Science and Technology, University of Abomey-Calavi, Godomey, Benin
4 Laboratory of Atmospheric Physics, Department of Physics, Faculty of Science and Technology, University of Abomey-Calavi, Godomey, Benin
Original language: French
Copyright © 2025 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
The study of extreme rainfall events is of paramount importance for socio-economic management and safeguarding. Road infrastructure, population, agricultural activities are among the sectors most affected by these events. To take the measures to reduce the impacts of these events, this work aims to characterize extreme rainfall in the Mono department over the period from 1960 to 2022. Daily rainfall data for the above-mentioned period interval are used. The methods used are: linear regression, generalized extreme values and the return period based on the Gumel formula and the standardized rainfall index. Trends in maximum daily rainfall were also explored for rainfall amounts ≥ 10 mm and 20 mm, 95th, 99th and 99.5th percentiles. In general, a positive trend of the extremes events is observed at the district of Grand-Popo (0,207 mm/year) while in Athieme (˗0,216 mm/year) and Bopa (˗0,114 mm/year), a decrease in these extremes events is evident, but with a slight increase over the department. The return periods between 2 and 5 years have experienced rainfall amounts varying between 80 and 125 mm throughout the department. These results are useful for water resources management and consequently those of agricultural activities as well as climate change adaptation and resilience.
Author Keywords: climate change, extremes rainfall, standardized precipitation index.
Volume 44, Issue 3, January 2025, Pages 732–748
Modestine Victoire Bessan1, Expédit Wilfrid Vissin2, Katchele Faustin Ogou3, and Euloge Ogouwale4
1 Laboratoire Pierre Pagney Climat, Eau, Ecosystèmes et Développement (LACEEDE), Université d’Abomey-Calavi, 03 BP 1122, Jéricho, Benin
2 Laboratoire Pierre Pagney Climat, Eau, Ecosystèmes et Développement (LACEEDE), Université d’Abomey-Calavi, 03 BP 1122, Jéricho, Benin
3 Laboratory of Atmospheric Physics, Department of Physics, Faculty of Science and Technology, University of Abomey-Calavi, Godomey, Benin
4 Laboratory of Atmospheric Physics, Department of Physics, Faculty of Science and Technology, University of Abomey-Calavi, Godomey, Benin
Original language: French
Copyright © 2025 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
The study of extreme rainfall events is of paramount importance for socio-economic management and safeguarding. Road infrastructure, population, agricultural activities are among the sectors most affected by these events. To take the measures to reduce the impacts of these events, this work aims to characterize extreme rainfall in the Mono department over the period from 1960 to 2022. Daily rainfall data for the above-mentioned period interval are used. The methods used are: linear regression, generalized extreme values and the return period based on the Gumel formula and the standardized rainfall index. Trends in maximum daily rainfall were also explored for rainfall amounts ≥ 10 mm and 20 mm, 95th, 99th and 99.5th percentiles. In general, a positive trend of the extremes events is observed at the district of Grand-Popo (0,207 mm/year) while in Athieme (˗0,216 mm/year) and Bopa (˗0,114 mm/year), a decrease in these extremes events is evident, but with a slight increase over the department. The return periods between 2 and 5 years have experienced rainfall amounts varying between 80 and 125 mm throughout the department. These results are useful for water resources management and consequently those of agricultural activities as well as climate change adaptation and resilience.
Author Keywords: climate change, extremes rainfall, standardized precipitation index.
Abstract: (french)
L’étude des évènements extrêmes de pluie revêt d’une importance capitale pour la gestion et la sauvegarde socio-économiques. Les infrastructures routières, la population, les activités agricoles font partie des secteurs les plus touchés par ces évènements. Pour pouvoir prendre des dispositions afin de réduire les impacts de ces évènements, ce travail se veut de caractériser les pluies extrêmes dans le département du Mono sur la période de 1960 à 2022. Les données journalières de pluie pour l’intervalle de période ci-mentionnée sont utilisées. Les méthodes employées sont: la régression linéaire, les valeurs extrêmes générales et la période se basant la formule de Gumel et l’indice standardise de pluie. Les tendances de pluie maximum journalière, des quantités de pluie ≥ 10 mm et 20 mm, des 95e, 99e et 99,5e percentiles ont été également explorées. En général, une tendance des plus extrêmes sont observées au niveau de Grand-Popo (0,207 mm/an) pendant qu’au niveau de Athieme (˗0,216 mm/an) et Bopa (˗0,114 mm/an), une diminution de ces extrêmes est évidente mais une légère augmentation au niveau départemental. Les périodes de retour comprises entre 2 à 5 ans ont connu des quantités de pluie variant entre 80 à 125 mm sur tout le département. Ces résultats sont utiles pour la gestion des ressources en eau et par conséquent celles activités agricoles.
Author Keywords: changement climatique, pluies extrêmes, indice standardisé de pluie.
How to Cite this Article
Modestine Victoire Bessan, Expédit Wilfrid Vissin, Katchele Faustin Ogou, and Euloge Ogouwale, “Analysis of trends in extreme rainfall in the department of Mono, Republic of Benin (West Africa),” International Journal of Innovation and Applied Studies, vol. 44, no. 3, pp. 732–748, January 2025.
