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Water 2016, 8(4), 165; doi:10.3390/w8040165

Time Series Analysis of Floods across the Niger River Basin

1
Potsdam Institute for Climate Impact Research, 14473 Potsdam, Germany
2
Agence du Bassin du Fleuve Niger (ABFN), Mali Republic
3
Institute of Ecology, Technical University of Berlin, Ernst-Reuter-Platz 1, 10587 Berlin, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Marco Franchini
Received: 7 November 2015 / Revised: 4 April 2016 / Accepted: 8 April 2016 / Published: 21 April 2016
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Abstract

This study analyses the increasing number of catastrophic floods in the Niger River Basin, focusing on the relation between long term hydro-climatic variability and flood risk over the last 40 to 100 years. Time series for three subregions (Guinean, Sahelian, Benue) show a general consistency between the annual maximum discharge (AMAX) and climatic decadal patterns in West Africa regarding both trends and major changepoints. Variance analysis reveals rather stable AMAX distributions except for the Sahelian region, implying that the changes in flood behavior differ within the basin and affect mostly the dry Sahelian region. The timing of the floods within the year has changed only downstream of the Inner Niger Delta due to retention processes. The results of the hydro-climatic analysis generally correspond to the presented damage statistics on people affected by catastrophic floods. The damage statistics shows positive trends for the entire basin since the beginning in the 1980s, with the most extreme increase in the Middle Niger. View Full-Text
Keywords: Niger River Basin; floods; flood risk; climate change Niger River Basin; floods; flood risk; climate change
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

Aich, V.; Koné, B.; Hattermann, F.F.; Paton, E.N. Time Series Analysis of Floods across the Niger River Basin. Water 2016, 8, 165.

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