Nguimalet C.R. auteur aut IRD Orange Didier auteur aut IRD text conferencePaper eng text/pdf reformatted digital access The research of ruptures on rainfall and discharge serial data from 1950 to 1995 of three small catchments (from 2000 to 6000 km2) of the Central African Republic, at the boundary between Chad and Congo basins, has shown a high spatial variability. The rupture observed in 1970 at the subcontinental scale, which started the drought period in West and Central Africa, is observed only on the Northward basin, the driest. Then it was difficult to compare the hydroclimatic periods from a basin to another one. However, all the studied basins have shown a degradation of the hydrological regime from the end of the 1980s onward, with a severe level since the end of 1980s. The depletion coefficients have the same range for the 3 studied basins than for the Ubangi River basin, widening the drought impact. specialized PRECIPITATION DEBIT VARIATION SPATIALE SECHERESSE HYDROCLIMAT REGIME HYDROLOGIQUE DEGRADATION EAU SOUTERRAINE METHODOLOGIE BASSIN VERSANT COURS D'EAU 1950 1995 SERIE CHRONOLOGIQUE CENTRAFRIQUE AFRIQUE CENTRALE 062REGHYD Global FRIEND-Water Conference : Hydrological Processes and Water Security in a Changing World, 8., Pékin (CHN), 2018/11/06-09 383 79-84 Yu Z. ed. edt IRD Lu C. ed. edt IRD Cai J. ed. edt IRD Mahé Gil ed. edt IRD Mishra A. ed. edt IRD Cudennec C. ed. edt IRD Van Lanen H.A.J. ed. edt IRD Orange Didier ed. edt IRD Amani A. ed. edt IRD Wallingford AISH 2020 https://www.documentation.ird.fr/hor/fdi:010083546 10.5194/piahs-383-79-2020 [F A010083545] https://www.documentation.ird.fr/hor/fdi:010083546 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/2022-04/010083546.pdf IRD - Base Horizon / Pleins textes 2021-10-07 2022-04-08 fdi:010083546 fre