@article{fdi:010053625,
  title = {{C}ombined use of optical and radar satellite data for the monitoring of irrigation and soil moisture of wheat crops},
  author = {{F}ieuzal, {R}. and {D}uchemin, {B}eno{\^i}t and {J}arlan, {L}ionel and {Z}ribi, {M}ehrez and {B}aup, {F}. and {M}erlin, {O}. and {H}agolle, {O}. and {G}aratuza-{P}ayan, {J}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he objective of this study is to get a better understanding of radar signal over irrigated wheat fields and to assess the potentialities of radar observations for the monitoring of soil moisture. {E}mphasis is put on the use of high spatial and temporal resolution satellite data ({E}nvisat/{ASAR} and {F}ormosat-2). {T}ime series of images were collected over the {Y}aqui irrigated area ({M}exico) throughout one agricultural season from {D}ecember 2007 to {M}ay 2008, together with measurements of soil and vegetation characteristics and agricultural practices. {T}he comprehensive analysis of these data indicates that the sensitivity of the radar signal to vegetation is masked by the variability of soil conditions. {O}n-going irrigated areas can be detected all over the wheat growing season. {T}he empirical algorithm developed for the retrieval of topsoil moisture from {E}nvisat/{ASAR} images takes advantage of the {F}ormosat-2 instrument capabilities to monitor the seasonality of wheat canopies. {T}his monitoring is performed using dense time series of images acquired by {F}ormosat-2 to set up the {SAFY} vegetation model. {T}opsoil moisture estimates are not reliable at the timing of plant emergence and during plant senescence. {E}stimates are accurate from tillering to grain filling stages with an absolute error about 9% (0.09 m(3) m(-3), 35% in relative value). {T}his result is attractive since topsoil moisture is estimated at a high spatial resolution (i.e. over subfields of about 5 ha) for a large range of biomass water content (from 5 and 65 t ha(-1)) independently from the viewing angle of {ASAR} acquisition (incidence angles {IS}1 to {IS}6).},
  keywords = {},
  booktitle = {},
  journal = {{H}ydrology and {E}arth {S}ystem {S}ciences},
  volume = {15},
  numero = {4},
  pages = {1117--1129},
  ISSN = {1027-5606},
  year = {2011},
  DOI = {10.5194/hess-15-1117-2011},
  URL = {https://www.documentation.ird.fr/hor/fdi:010053625},
}