@article{fdi:010060373,
  title = {{A} study of sediment transport in the {M}adeira {R}iver, {B}razil, using {MODIS} remote-sensing images},
  author = {{V}illar, {R}. {E}. and {M}artinez, {J}ean-{M}ichel and {L}e {T}exier, {M}. and {G}uyot, {J}ean-{L}oup and {F}raizy, {P}ascal and {M}eneses, {P}. {R}. and de {O}liveira, {E}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he {M}adeira {R}iver may contribute nearly half of the {A}mazon {R}iver sediment discharge to the {A}tlantic {O}cean, showing the highest erosion rates in the {A}mazon {B}asin. {H}owever, few studies have assessed the {M}adeira {R}iver sediment budget and the transport processes occurring in the main stem of the river. {I}n this study, {MODIS} space-borne sensors were used to analyze the suspended sediment transport processes along the main stem of the {M}adeira {R}iver. {F}ield measurements of suspended sediment concentration, spectral radiometry and granulometry were performed during 10 cruises from 2007 to 2011. {T}he relationship between the spectral reflectance and the surface suspended sediment concentration ({SSSC}) was analyzed using both field radiometric measurements and satellite data. {T}en-day {SSSC} samples acquired by the {HYBAM} monitoring network were used to match satellite observations with field measurements performed from 2000 to 2011. {O}ver 900 {MODIS} images of 6 different locations were processed to monitor the {SSSC} dynamics in space and time. {S}atellite reflectance was found to be significantly correlated with the {SSSC}. {H}owever, a seasonal dependency was demonstrated, most likely caused by a variable granulometric distribution along the annual cycle. {T}he ratio between the red and near-infrared bands was found to be free of the seasonal dependency (r = 0.79, {N} = 282), and a {SSSC} retrieval model was built from the satellite data using a bootstrap resampling technique. {T}he satellite-retrieved {SSSC} time series showed excellent accuracy over the 11-year period and at two different stations located 800 km from each other. {T}he satellite data were averaged to analyze the {SSSC} pattern temporally and spatially along the entire {M}adeira {R}iver, which provided evidence of significant sedimentation and resuspension. {T}he backwater effect caused by the two-to-three-month lag between peak water in the {M}adeira and {A}mazon {R}ivers was used to predict local sedimentation near the {M}adeira {R}iver mouth. {O}ur results facilitated a precise assessment of such sedimentation, which demonstrated an {SSSC} decrease 400 km upstream from the {M}adeira {A}mazon confluence.},
  keywords = {{S}ediment transport ; {M}adeira river ; {R}emote sensing ; {M}odis ; {R}adiometry ; {H}ydrology ; {BRESIL}},
  booktitle = {},
  journal = {{J}ournal of {S}outh {A}merican {E}arth {S}ciences},
  volume = {44},
  numero = {{SI}},
  pages = {45--54},
  ISSN = {0895-9811},
  year = {2013},
  DOI = {10.1016/j.jsames.2012.11.006},
  URL = {https://www.documentation.ird.fr/hor/fdi:010060373},
}