alexa Climate Change Impacts on the Ouémé River, Benin, West Africa
ISSN: 2157-7617

Journal of Earth Science & Climatic Change
Open Access

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Case Report

Climate Change Impacts on the Ouémé River, Benin, West Africa

Gilles RC Essou and Francois Brissette*
Ecole de Technologie Supérieure (ETS), 1100 rue Notre-Dame Ouest, Montreal QC, H3C 1K3, Canada
Corresponding Author : François Brissette
Ecole de Technologie Supérieure (ETS)
1100 rue Notre-Dame Ouest, Montreal QC, H3C 1K3, Canada
Tel: 514-947-1114
E-mail: [email protected]
Received September 04, 2013; Accepted September 22, 2013; Published September 30, 2013
Citation: Essou GRC, Brissette F (2013) Climate Change Impacts on the Ouémé River, Benin, West Africa. J Earth Sci Clim Change 4:161. doi: 10.4172/2157-7617.1000161
Copyright: © 2013 Essou GRC, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

The present study identifies the future impacts of climate change on the flows of the Ouémé River in Bonou, for the 2035-2064 and 2070-2099 periods. For this identification, a set of 65 climate projections from 24 climate models, based on three greenhouse gas emissions scenarios (A2, B1 and A1B) was used. Hydrologic simulations were carried out with a lumped conceptual hydrology model. The results obtained from this study show that daily temperatures in the Ouémé catchment over the reference period (1971-2000) will raise by up to 5°C during the 2070-2099 horizon. For their part, mean daily precipitation projections are much more uncertain. However, what is clear is that mean monthly flows will see a drop potentially as high as 30% during the rainy season, and 20% during the dry season. Similarly, mean seasonal and annual flows will drop by as much as 8 to 10% and 3 to 5%, respectively. This drop will also affect maximum annual flows at a proportion of approximately 3% in the 2035-2064 period and of 5% between 2070 and 2099. This study also showed that we will be seeing changes in extreme flows. These changes will be characterized by a slight drop in quantiles for return periods of less than 10 years, and a potential increase of up to 100 m3/s (an increase of approximately 6%) for quantiles of the return period of 100 years covering the 2070-2099 horizon. These changes have impacts on the economic activities and on the water resource availability in the catchment.

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