@article{fdi:010006863,
  title = {{T}ypology of rainfall fields to improve rainfall estimation in the {S}ahel by the area threshold method},
  author = {{A}mani, {A}. and {L}ebel, {T}hierry and {R}ousselle, {J}. and {T}aupin, {J}ean-{D}enis},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he stratification of rainfall fields to improve specific rainfall models is a subject that has received relatively little attention in the literature. {I}t is shown here that objective classification techniques, based on the intensities and spatial distribution of the rainfall fields, can produce meaningful results in terms of the area threshold method ({ATM}) model and climatology. {F}our approaches for rainfall classification, using rain gauge data, are proposed in order to improve the average areal rainfall estimation in the {S}ahel by the {ATM} model. {T}wo of them are based on the structural behavior of the rainy area (area where it rains above a given threshold) function against a threshold. {B}ased on this function, a new parameter, called the under profile area ({UPA}), has been proposed for the classification of rainfall fields. {T}he groups obtained from the method based on this parameter are characterized by different average spatial structures. {A} significant improvement on the {ATM} model is observed by considering classification based on the {UPA} parameter. {A}n average reduction of 34 % of the root-mean-square error is observed in a validation term. {T}his improvement is a direct consequence of the fact that the optimal thresholds are different from one group to another, which is an important point when considering the impact of classification on the {ATM} model. ({R}{\'e}sum{\'e} d'auteur)},
  keywords = {{PLUVIOMETRIE} ; {PRECIPITATION} ; {TYPOLOGIE} ; {ESTIMATION} ; {DISTRIBUTION} {SPATIALE} ; {MODELISATION} ; {CLASSIFICATION} ; {ZONE} {SAHELIENNE}},
  booktitle = {},
  journal = {{W}ater {R}esources {R}esearch},
  volume = {32},
  numero = {8},
  pages = {2473--2487},
  ISSN = {0043-1397},
  year = {1996},
  URL = {https://www.documentation.ird.fr/hor/fdi:010006863},
}