ANALYSE DE PHENOMÈNES HYDROLOGIQUES DANS UN BASSIN VERSANT URBANISÉ: CAS DE LA VILLE DE YAMOUSSOUKRO (CENTRE DE LA COTE D’IVOIRE)

Abstract

This study focuses on the analysis of hydrological phenomena causing pollution landscaped lakes of Yamoussoukro city (Center of Ivory Coast). The methodology takes into account the analysis of climate variability (Pettitt test and graphical representation), water balance (Coutagne method, of Thornthwaite method and Tixeront-Berkaloff method) and comparative analysis using from potential evapotranspiration and real evapotranspiration on a monthly time. The results of this study were used to characterize the main manifestations of climate variability (1975-2009) observed for more than three decades in the region of Yamoussoukro. It appears from the study of the conditions of prolonged rainfall deficits have been identified before 1992. The post-1992 is characterized by a resumption of rainfall without reaching the heights of rainfall before 1970