@article{fdi:010053443,
  title = {{C}haracterization and disaggregation of daily rainfall in the {U}pper {B}lue {N}ile {B}asin in {E}thiopia},
  author = {{E}ngida, {A}. {N}. and {E}steves, {M}ichel},
  abstract = {{I}n {E}thiopia, available rainfall records are mainly limited to daily time steps. {T}hough rainfall data at shorter time steps are important for various purposes like modeling of erosion processes and flood hydro-graphs, they are hardly available in {E}thiopia. {T}he objectives of this study were (i) to study the temporal characteristics of daily rains at two stations in the region of the {U}pper {B}lue {N}ile {B}asin ({UBNB}) and (ii) to calibrate and evaluate a daily rainfall disaggregation model. {T}he analysis was based on rainfall data of {B}ahir {D}ar and {G}onder {M}eteorological {S}tations. {T}he disaggregation model used was the {M}odified {B}artlett-{L}ewis {R}ectangular {P}ulse {M}odel ({MBLRPM}). {T}he mean daily rainfall intensity varied from about 4 mm in the dry season to 17 mm in the wet season with corresponding variation in raindays of 0.4-26 days. {T}he observed maximum daily rainfall varied from 13 mm in the dry month to 200 mm in the wet month. {T}he average wet/dry spell length varied from 1/21 days in the dry season to 6/1 days in the rainy season. {M}ost of the rainfall occurs in the afternoon and evening periods of the day. {D}aily rainfall disaggregation using the {MBLRPM} alone resulted in poor match between the disaggregated and observed hourly rainfalls. {S}tochastic redistribution of the outputs of the model using {B}eta probability distribution function improved the agreement between observed and calculated hourly rain intensities. {I}n areas where convective rainfall is dominant, the outputs of {MBLRPM} should be redistributed using relevant probability distributions to simulate the diurnal rainfall pattern.},
  keywords = {{E}thiopia ; {R}ainfall ; {D}isaggregation ; {B}artlett-{L}ewis model},
  journal = {{J}ournal of {H}ydrology},
  volume = {399},
  numero = {3-4},
  pages = {226--234},
  ISSN = {0022-1694},
  year = {2011},
  DOI = {10.1016/j.jhydrol.2011.01.001},
  URL = {http://www.documentation.ird.fr/hor/fdi:010053443},
}