Articles | Volume 370
https://doi.org/10.5194/piahs-370-117-2015
https://doi.org/10.5194/piahs-370-117-2015
11 Jun 2015
 | 11 Jun 2015

Analysis of hydrological changes and flood increase in Niamey based on the PERSIANN-CDR satellite rainfall estimate and hydrological simulations over the 1983–2013 period

C. Casse and M. Gosset

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Model-based study of the role of rainfall and land use–land cover in the changes in the occurrence and intensity of Niger red floods in Niamey between 1953 and 2012
Claire Casse, Marielle Gosset, Théo Vischel, Guillaume Quantin, and Bachir Alkali Tanimoun
Hydrol. Earth Syst. Sci., 20, 2841–2859, https://doi.org/10.5194/hess-20-2841-2016,https://doi.org/10.5194/hess-20-2841-2016, 2016
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Cited articles

Albergel, J.: Sécheresse, désertification et ressources en eau de surface – Application aux petits bassins du Burkina Faso, in: The Influence of Climate Change and Climatic Variability on the Hydrologic Regime and Water Resources, IAHS, Vancouver, 355–365, 1987.
Amani, A. and Nguetora, M.: Evidence d'une modification du régime hydrologique du fleuve Niger à Niamey, in: 4th FRIEND 2002 – Regional Hydrology?: Bridging the Gap between Research and Practice, IAHS PUBLICATION, Cape Town, South Africa, 449–456, 2002.
Ashouri, H., Hsu, K.-L., Sorooshian, S., Braithwaite, D. K., Knapp, K. R., Dewayne Cecil, L., Nelson, B. R., and Prat, O. P.: PERSIANN-CDR: Daily Precipitation Climate Data Record from Multisatellite Observations for Hydrological and Climate Studies, B. Am. Meteor. Soc., 96, 69–83, https://doi.org/10.1175/BAMS-D-13-00068.1, 2015.
Bitew, M. M. and Gebremichael, M.: Evaluation of satellite rainfall products through hydrologic simulation in a fully distributed hydrologic model, Water Resour. Res., 47, W06526. https://doi.org/10.1029/2010WR009917, 2011.
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Short summary
A dramatic increase in the frequency and intensity of floods due to the Niger River has been observed in the last decade in Niamey. This paper analyses how changes in rainfall may explain this flood intensification, based on a 30 year long series of satellite rainfall and a hydrological model. We show that the salient changes in the mean decadal hydrograph between 1983 and 2013 are well mimicked by the simulations. This implyes that rainfall is the first driver to the observed changes.