@article{PAR00003521,
  title = {{C}ombining a large aperture scintillometer and estimates of available energy to derive evapotranspiration over several agricultural fields in a semi-arid region},
  author = {{E}zzahar, {J}. and {C}hehbouni, {A}bdelghani and {E}r-{R}aki, {S}. and {H}anich, {L}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he objective of the present study was to investigate the potential of a large aperture scintillometer ({LAS}) combined with a simple available energy model to estimate area-averaged latent heat flux in difficult environmental conditions. {T}he difficulties are related to the sparseness of the vegetation, the heterogeneity of the soil characteristics, and, most importantly, the heterogeneity in terms of soil moisture induced by the flood irrigation method. {I}n this context, three sites ({A}gdal, {R}3 and {S}aada) in the {T}ensift {A}l {H}aouz plain (region of {M}arrakech city, central {M}orocco) have been equipped with a {LAS} and eddy covariance ({EC}) system (local scale measurements). {A}gdal and {R}3 are a flood-irrigated olive yard and wheat field, respectively. {S}aada is a drip-irrigated orange orchard. {D}ue to the irrigation method applied, the {A}gdal and {R}3 sites shifted from being almost homogeneous between two irrigations (dry conditions) and completely heterogeneous during the irrigation events (large variability of soil moisture along the site), while {S}aada was always heterogeneous, at least at the scintillometer footprint scale. {C}onsequently, the comparison between the sensible heat fluxes derived from both {LAS} and {EC} showed a large scatter during the irrigation events, while a good correspondence was found in between two irrigations. {I}t was also found that combining {LAS} and an estimate of the available energy (using a simple model) can provide reasonable large-scale evapotransipration estimates, which are of prime interest for irrigation management.},
  keywords = {{E}vapotranspiration ; olive ; orange ; scintillation ; semi-arid region ; wheat},
  booktitle = {},
  journal = {{P}lant {B}iosystems},
  volume = {143},
  numero = {1},
  pages = {209--221},
  ISSN = {1126-3504},
  year = {2009},
  DOI = {10.1080/11263500802710036},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00003521},
}