期刊名称：International Research Journal of Environmental Sciences
电子版ISSN：2319-1414
出版年度：2018
卷号：7
期号：11
页码：22-36
语种：English
出版社：International Science Community Association
摘要：This study is based on rainfall data collected at the Tambacounda, Kédougou, Bakel, Goudiry and Koumpentoum stations over the period 1951-2015. It aims to identify the most notable meteorological droughts by their intensity, duration, frequency and threshold during the study period. To achieve these objectives, we used the standard deviation method because of its robustness in this sense. At the end of this work, we note a great vulnerability and an increased drying up experienced by Eastern Senegal during this period. Dry episodes are generally more persistent and more extensive in time and space than wet ones. These dry episodes reached their paroxysm in 1984, 1991 and 1996 with extremely severe droughts. Among the five stations studied, those of Goudiry, Kédougou and Bakel seem the most affected by the phenomenon of its severity and recurrence. These results would be in our opinion, be a source of reflection for the authorities on the dependence on rainfed agriculture in this area.
关键词：Drought;Temporal and spatial persistence;rainfall deficit;regional phenomenon;water stress;natural disaster;rainfed agriculture;food insecurity
