@article{fdi:010063647,
  title = {{C}haracterising the space-time structure of rainfall in the {S}ahel with a view to estimating {IDAF} curves},
  author = {{P}anthou, {G}. and {V}ischel, {T}. and {L}ebel, {T}hierry and {Q}uantin, {G}. and {M}olinie, {G}.},
  editor = {},
  language = {{ENG}},
  abstract = {{I}ntensity-duration-area-frequency ({IDAF}) curves are increasingly demanded for characterising the severity of storms and for designing hydraulic structures. {T}heir computation requires inferring areal rainfall distributions over the range of space scales and timescales that are the most relevant for hydrological studies at catchment scale. {I}n this study, {IDAF} curves are computed for the first time in {W}est {A}frica, based on the data provided by the {AMMA}-{CATCH} {N}iger network, composed of 30 recording rain gauges having operated since 1990 over a 16 000 km(2) area in south-western {N}iger. {T}he {IDAF} curves are obtained by separately considering the time (intensity-duration-frequency, {IDF}) and space (areal reduction factor, {ARF}) components of the extreme rainfall distribution. {A}nnual maximum intensities are extracted for resolutions between 1 and 24 h in time and from point (rain gauge) to 2500 km(2) in space. {T}he {IDF} model used is based on the concept of scale invariance (simple scaling) which allows the normalisation of the different temporal resolutions of maxima series to which a global generalised extreme value ({GEV}) is fitted. {T}his parsimonious framework allows one to use the concept of dynamic scaling to describe the {ARF}. {T}he results show that coupling a simple scaling in space and time with a dynamical scaling that relates to space and time allows one to satisfactorily model the effect of space-time aggregation on the distribution of extreme rainfall.},
  keywords = {{SAHEL} ; {AFRIQUE} {DE} {L}'{OUEST} ; {NIGER}},
  booktitle = {},
  journal = {{H}ydrology and {E}arth {S}ystem {S}ciences},
  volume = {18},
  numero = {12},
  pages = {5093--5107},
  ISSN = {1027-5606},
  year = {2014},
  DOI = {10.5194/hess-18-5093-2014},
  URL = {https://www.documentation.ird.fr/hor/fdi:010063647},
}