Lienou G. auteur aut IRD Mahé Gil auteur aut IRD Paturel Jean-Emmanuel auteur aut IRD Servat Eric auteur aut IRD Sighomnou D. auteur aut IRD Ekodeck G. E. auteur aut IRD Dezetter Alain auteur aut IRD Dieulin Claudine auteur aut IRD text journalArticle fre text/pdf born digital access Analysis of the spatio-temporal variability of rainfall amounts, discharge and runoff coefficients, for monthly, seasonal and annual time steps in equatorial south Cameroon, reveals that annual values of rainfall and discharge have decreased during the years of greatest drought (1972-1973 and 1983-1984). The most significant climatic change is a modification of rainfall regime during the dry seasons, which led to a change ill the annual hydrological cycle. The decrease in rainfall during the dry season in December-February generates a decrease in the runoff coefficients during the subsequent short rainy season (March-June). Conversely, although the corresponding rainfall has not changed much during the rainy season in September-November, the discharge has increased, probably due to the fact that rainfall during the short dry season (July and August) has been much higher for several decades. This is assumed to indicate a change in climate in southwest Cameroon, also evident in Gabon and Congo. Over the Kienke basin, the progressive disappearance of he short dry season in July-August has resulted in a tendency for the two rainy seasons to merge into one. specialized Equatorial climate Climatic variability Cameroon Rainfall Discharge 062 53 4 789-801 2008 0262-6667 https://www.documentation.ird.fr/hor/fdi:010044042 10.1623/hysj.53.4.789 0262-6667 [F B010044042] https://www.documentation.ird.fr/hor/fdi:010044042 https://www.documentation.ird.fr/intranet/publi/2008/10/010042818.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2008-11-07 2017-08-24 fdi:010044042 fre