@article{fdi:010049068,
  title = {{U}sing the dual approach of {FAO}-56 for partitioning {ET} into soil and plant components for olive orchards in a semi-arid region},
  author = {{E}r-{R}aki, {S}. and {C}hehbouni, {A}bdelghani and {B}oulet, {G}illes and {W}illiams, {D}. {G}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he main goal of this research was to evaluate the potential of the dual approach of {FAO}-56 for estimating actual crop evapotranspiration ({AET}) and its components (crop transpiration and soil evaporation) of an olive ({O}lea europaea {L}) orchard in the semi-arid region of {T}ensift-basin (central of {M}orocco). {T}wo years (2003 and 2004) of continuous measurements of {AET} with the eddy-covariance technique were used to test the performance of the model. {T}he results showed that, by using the local values of basal crop coefficients, the approach simulates reasonably well {AET} over two growing seasons. {T}he {R}oot {M}ean {S}quare {E}rror ({RMSE}) between measured and simulated {AET} values during 2003 and 2004 were respectively about 0.54 and 0.71 mm per day. {T}he basal crop coefficient ({K}-cb) value obtained for the olive orchard was similar in both seasons with an average of 0.54. {T}his value was lower than that suggested by the {FAO}-56 (0.62). {S}imilarly, the single approach of {FAO}-56 has been tested in the previous work ({E}r-{R}aki et al., 2008) over the same study site and it has been shown that this approach also simulates correctly {AET} when using the local crop coefficient and under no stress conditions. {S}ince the dual approach predicts separately soil evaporation and plant transpiration, an attempt was made to compare the simulated components of {AET} with measurements obtained through a combination of eddy covariance and scaled-up sap flow measurements. {T}he results showed that the model gives an acceptable estimate of plant transpiration and soil evaporation. {T}he associated {RMSE} of plant transpiration and soil evaporation were 0.59 and 0.73 mm per day, respectively. {A}dditionally, the irrigation efficiency was investigated by comparing the irrigation scheduling design used by the farmer to those recommended by the {FAO} model. {I}t was found that although the amount of irrigation applied by the farmer (800 mm) during the growing season of olives was twice that recommended one by the {FAO} model (411 mm), the vegetation suffered from water stress during the summer. {S}uch behaviour can be explained by inadequate distribution of irrigation. {C}onsequently, the {FAO} model can be considered as a potentially useful tool for planning irrigation schedules on an operational basis.},
  keywords = {{C}rop coefficient ; {E}vapotranspiration ; {E}ddy covariance ; {FAO}-56 model ; {O}len europaea ; {S}ap flow},
  booktitle = {},
  journal = {{A}gricultural {W}ater {M}anagement},
  volume = {97},
  numero = {11},
  pages = {1769--1778},
  ISSN = {0378-3774},
  year = {2010},
  DOI = {10.1016/j.agwat.2010.06.009},
  URL = {https://www.documentation.ird.fr/hor/fdi:010049068},
}