期刊名称：Science et changements planétaires / Sécheresse
印刷版ISSN：1147-7806
电子版ISSN：1777-5922
出版年度：2013
卷号：24
期号：1
页码：3-13
DOI：10.1684/sec.2013.0370
出版社：John Libbey Eurotext
摘要：Figures See all figures Authors Daniel Sighomnou , Luc Descroix , Pierre Genthon , Gil Mahé , Ibrahim Bouzou Moussa , Emmanuèle Gautier , Ibrahim Mamadou , Jean-Pierre Vandervaere , Tanimoun Bachir , Bréhima Coulibaly , Jean-Louis Rajot , Oumarou Malam Issa , Moussa Malam Abdou , Nadine Dessay , Eric Delaitre , Oumarou Faran Maiga , Arona Diedhiou , Gérémy Panthou , Théo Vischel , Hamma Yacouba , Harouna Karambiri , Jean-Emmanuel Paturel , Pierre Diello , Eric Mougin , Laurent Kergoat , Pierre Hiernaux ABN, BP 729, Niamey, Niger Key words: crusted soils, extreme rainfall events, Niger, red flood, runoff coefficient DOI : 10.1684/sec.2013.0370 Page(s) : 3-13 Published in: 2013 During the 2012 monsoon, the Middle Niger River exhibited the highest flood ever registered from the beginning of its monitoring in1929. Large areas were flooded, including parts of the city of Niamey. This flooding was due to the combination of an increase in runoff coefficient observed in the Sahelian basin, linked to soil crusting, and an exceptionally high amount of rainfall. Indeed, it was the highest observed since the beginning of the drought in 1968. Due to the level of damage, policy makers should be made aware of the increase in discharges, which is increasing the risk of flooding.
关键词：crusted soils; extreme rainfall events; Niger; red flood; runoff coefficient
