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Hydrology 2016, 3(1), 5; doi:10.3390/hydrology3010005

Regional Flood Frequency Analysis in the Volta River Basin, West Africa

1
Graduate Research Program on Climate Change andWater Resources,West African Science Service Center on Climate Change and Adapted Land Use (WASCAL), University of Abomey-Calavi, Cotonou, Abomey-Calavi BP 2008, Benin
2
CSIR-Water Research Institute, Accra P.O. Box M 32, Ghana
3
Department of Geography, University of Bonn, Bonn 53115, Germany
4
University of Parakou, BP 123 Parakou, Benin
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Luca Brocca
Received: 9 November 2015 / Accepted: 26 January 2016 / Published: 6 February 2016
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Abstract

In the Volta River Basin, flooding has been one of the most damaging natural hazards during the last few decades. Therefore, flood frequency estimates are important for disaster risk management. This study aims at improving knowledge of flood frequencies in the Volta River Basin using regional frequency analysis based on L-moments. Hence, three homogeneous groups have been identified based on cluster analysis and a homogeneity test. By using L-moment diagrams and goodness of fit tests, the generalized extreme value and the generalized Pareto distributions are found suitable to yield accurate flood quantiles in the Volta River Basin. Finally, regression models of the mean annual flood with the size of the drainage area, mean basin slope and mean annual rainfall are proposed to enable flood frequency estimation of ungauged sites within the study area. View Full-Text
Keywords: flood; Volta River Basin; regional frequency analysis; L-moments flood; Volta River Basin; regional frequency analysis; L-moments
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. (CC BY 4.0).

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MDPI and ACS Style

Komi, K.; Amisigo, B.A.; Diekkrüger, B.; Hountondji, F.C.C. Regional Flood Frequency Analysis in the Volta River Basin, West Africa. Hydrology 2016, 3, 5.

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