Climate Change Impacts on the Ou é m é River, Benin, West Africa
Received Date: Sep 04, 2013 / Accepted Date: Sep 22, 2013 / Published Date: Sep 30, 2013
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.
Keywords: Climate change; Hydrology model; Impacts; Flows; Water availability
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.
Select your language of interest to view the total content in your interested language
Share This Article
Open Access Journals
- Total views: 13153
- [From(publication date): 12-2013 - May 13, 2021]
- Breakdown by view type
- HTML page views: 9201
- PDF downloads: 3952