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Open AccessArticle

Mid-Century Climate Change Impacts on Ouémé River Discharge at Bonou Outlet (Benin)

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Laboratory of Applied Hydrology (LHA), National Water Institute (INE), 01 BP 4521 Cotonou, Benin
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West African Science Service Center on Climate Change and Adapted Land Use (WASCAL), National Water Institute (INE), 01 BP 4521 Cotonou, Benin
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West African Science Service Center on Climate Change and Adapted Land Use (WASCAL), University of Lomé, BP 1515 Lomé, Togo
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Chaire Internationale en Physique Mathématique et Applications (CIPMA), Université d’Abomey-Calavi (UAC), 072 BP 50 Cotonou, Benin
*
Author to whom correspondence should be addressed.
Hydrology 2019, 6(3), 72; https://doi.org/10.3390/hydrology6030072
Received: 15 May 2019 / Revised: 24 July 2019 / Accepted: 12 August 2019 / Published: 17 August 2019
This work focuses on impacts of climate change on Ouémé River discharge at Bonou outlet based on four global climate models (GCM) over Ouémé catchment from 1971 to 2050. Empirical quantile mapping method is used for bias correction of GCM. Furthermore, twenty-five rain gauges were selected among which are three synoptic stations. The semi-distributed model HEC-HMS (Hydrologic Modeling System from Hydrologic Engineering Center) is used to simulate runoff. As results, HEC-HMS showed ability to simulate runoff while taking into account land use and cover change. In fact, Kling–Gupta Efficiency (KGE) coefficient was 0.94 and 0.91 respectively in calibration and validation. Moreover, Ouémé River discharge is projected to decrease about 6.58 m3/s under Representative Concentration Pathways (RCP 4.5) while an insignificant increasing trend is found under RCP 8.5. Therefore, water resource management infrastructure, especially dam construction, has to be developed for water shortage prevention. In addition, it is essential to account for uncertainties when designing such sensitive infrastructure for flood management. View Full-Text
Keywords: climate change; HEC-HMS; Ouémé River catchment climate change; HEC-HMS; Ouémé River catchment
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Lawin, A.E.; Hounguè, R.; N’Tcha M’Po, Y.; Hounguè, N.R.; Attogouinon, A.; Afouda, A.A. Mid-Century Climate Change Impacts on Ouémé River Discharge at Bonou Outlet (Benin). Hydrology 2019, 6, 72.

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