Variabilite Des Extremes Pluviometriques Sur Le Bassin Versant De La Riviere Bia (Sud-Est, Cote d’Ivoire)

Climate change is a reality which affects many climatic variables, including precipitation. The objective of this article is to study the extreme rain variability from a historical database (1941 - 2000). For this purpose, eleven (11) rainfall indices were calculated at the Adiaké, Bianouan, Ayamé,...

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Published inEuropean Scientific Journal (Kocani) Vol. 14; no. 2; p. 134
Main Authors Martin, Kouassi Kan, Lazare, Kouassi Kouakou, Blaise, Yao Koffi, Hermann, Meledje N'diaye, Jean, Biemi, Théophile, Lasm, Rouché, Nathalie
Format Journal Article
LanguageEnglish
Published European Scientific Institute 31.01.2018
Subjects
Climatology
Earth Sciences
Environmental Sciences
Sciences of the Universe
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Summary:Climate change is a reality which affects many climatic variables, including precipitation. The objective of this article is to study the extreme rain variability from a historical database (1941 - 2000). For this purpose, eleven (11) rainfall indices were calculated at the Adiaké, Bianouan, Ayamé, and Agnibilekro rainfall stations in Côte d'Ivoire. Due to lack of data on daily rainfall on the Ghanaian section of watershed, nine (9) monthly precipitations indices were estimated from monthly rainfall at the Enshi and Buakuc stations. The trend analysis of the precipitations indices show that a generalized downward was most significant in Adiaké compared to other stations. Furthermore, indices extreme thresholding (P99, P99p, P99,5 and P99,5p) have experienced a stable trend and a stationary evolution. All steps were detected in the non-stationary indices mostly observed after 1980 (late break) and before 1960 (precocious break).
ISSN:1857-7881
1857-7431
DOI:10.19044/esj.2018.v14n2p134