@article{fdi:010064806,
  title = {{S}oil clay content mapping using a time series of {L}andsat {TM} data in semi-arid lands},
  author = {{S}habou, {M}. and {M}ougenot, {B}ernard and {C}habaane, {Z}. {L}. and {W}alter, {C}. and {B}oulet, {G}illes and {B}en {A}issa, {N}. and {Z}ribi, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{C}lay content (fraction < 2 mu m) is one of the most important soil properties. {I}t controls soil hydraulic properties like wilting point, field capacity and saturated hydraulic conductivity, which in turn control the various fluxes of water in the unsaturated zone. {I}n our study site, the {K}airouan plain in central {T}unisia, existing soil maps are neither exhaustive nor sufficiently precise for water balance modeling or thematic mapping. {T}he aim of this work was to produce a clay-content map at fine spatial resolution over the {K}airouan plain using a time series of {L}andsat {T}hematic {M}apper images and to validate the produced map using independent soil samples, existing soil map and clay content produced by {T}erra{SAR}-{X} radar data. {O}ur study was based on 100 soil samples and on a dataset of four {L}andsat {TM} data acquired during the summer season. {R}elationships between textural indices ({MID}-{I}nfrared) and topsoil clay content were studied for each selected image and were used to produce clay content maps at a spatial resolution of 30 m. {C}okriging was used to fill in the gaps created by green vegetation and crop residues masks and to predict clay content of each pixel of the image at 100 m grid spatial resolution. {R}esults showed that mapping clay content using a time series of {L}andsat {TM} data is possible and that the produced clay content map presents a reasonable accuracy ({R}-2 = 0.65, {RMSE} = 100 g/kg). {T}he produced clay content map is consistent with existing soil map of the studied region. {C}omparison with clay content map generated from {T}erra{SAR}-{X} radar data on a small area with no calibration point revealed similarities in topsoil clay content over the largest part of this extract, but significant differences for several areas. {I}n-situ observations at those locations showed that the {L}andsat {TM} mapping was more consistent with observations than the {T}erra{SAR}-{X} mapping.},
  keywords = {{TUNISIE} ; {ZONE} {SEMIARIDE}},
  booktitle = {},
  journal = {{R}emote {S}ensing},
  volume = {7},
  numero = {5},
  pages = {6059--6078},
  ISSN = {2072-4292},
  year = {2015},
  DOI = {10.3390/rs70506059},
  URL = {https://www.documentation.ird.fr/hor/fdi:010064806},
}