@article{fdi:010090928,
  title = {{L}ong-term variability in hydrological droughts and floods in sub-{S}aharan {A}frica : new perspectives from a 65-year daily streamflow dataset},
  author = {{E}kolu, {J}. and {D}ieppois, {B}. and {S}idibe, {M}. and {E}den, {J}.{M}. and {T}ramblay, {Y}ves and {V}illarini, {G}. and {P}eña-{A}ngulo, {D}. and {M}ah{\'e}, {G}il and {P}aturel, {J}ean-{E}mmanuel and {O}nyutha, {C}. and {V}an de {W}iel, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{U}nderstanding hydrological variability is of crucial importance for water resource management in sub-{S}aharan {A}frica ({SSA}). {W}hile existing studies typically focus on individual river basins, and suffer from incomplete records, this study provides a new perspective of trends and variability in hydrological flood and drought characteristics (frequency, duration, and intensity) across the entire {SSA}. {T}his is achieved by: i) creating a 65-year long, complete daily streamflow dataset consisting of over 600 gauging stations; ii) quantifying changes in flood and drought characteristics between 1950 and 2014; iii) evaluating how decadal variability influences historical trends. {R}esults of daily streamflow reconstructions using random forests provide satisfactory performance over most of {SSA}, except for parts of southern {A}frica. {U}sing change-point and trend analyses, we identify-three periods that characterise historical variations affecting hydrological extremes in western and central {A}frica, and some parts of southern {A}frica: i) the 1950s-60s and after the 1980s-90s, when floods (droughts) tend to be more (less) intense, more (less) frequent and more (less) persistent; and ii) the 1970s-80s, when floods (droughts) are less (more) intense, less (more) frequent and less (more) persistent. {F}inally, we reveal significant decadal variations in all flood and drought characteristics, which explain aperiodic increasing and decreasing trends. {T}his stresses the importance of considering multiple time-periods when analysing recent trends, as previous assessments may have been unrepresentative of long-term changes.},
  keywords = {{AFRIQUE} {SUBSAHARIENNE}},
  booktitle = {},
  journal = {{J}ournal of {H}ydrology},
  volume = {613},
  numero = {},
  pages = {128359 [17 ]},
  ISSN = {0022-1694},
  year = {2022},
  DOI = {10.1016/j.jhydrol.2022.128359},
  URL = {https://www.documentation.ird.fr/hor/fdi:010090928},
}