@article{fdi:010058859, title = {{D}ischarge and suspended sediment flux estimated along the mainstream of the {A}mazon and the {M}adeira {R}ivers (from in situ and {MODIS} {S}atellite {D}ata)}, author = {{M}angiarotti, {S}ylvain and {M}artinez, {J}. {M}. and {B}onnet, {M}. {P}. and {B}uarque, {D}. {C}. and {F}ilizola, {N}. and {M}azzega {C}iamp, {P}ierre}, editor = {}, language = {{ENG}}, abstract = {{W}ater and suspended sediment fluxes are considered during the period 2000-2008 in a region including the full {A}mazon {R}iver from the confluence of the {N}egro {R}iver to {S}antarem, the end part of the {S}olimoes {R}iver, and the lower part of the {M}adeira {R}iver. {T}hree types of data are used: water discharge estimated from field measurements, and suspended sediment obtained from field measurements and derived from {MODIS} satellite data. {A} generalized least square method including a propagating term is developed in order to propagate the signal upward and downward the river. {T}he approach is introduced and tested. {S}everal experiments are considered in order, first, to estimate the ability to propagate the signal from stations located before the confluences of {N}egro and {M}adeira {R}ivers to stations located on the {A}mazon {R}iver; second to investigate the possibility to propagate the signal along the {A}mazon {R}iver which dynamics is coupled with floodplains dynamics; and third to produce optimal solutions of water and sediment fluxes. {F}or each experiment, the influence of field and satellite data is compared. {T}he approach is efficient in the upper part of the region of study where the {S}olimoes, the {N}egro and the {M}adeira {R}ivers meet and fails in the lower part of the region where interactions between {A}mazon {R}iver and floodplains play an important role on the fluxes' dynamics. {T}he optimal experiment includes in situ and satellite data from all the stations available and is used to analyse the recent evolution of suspended sediment flux along the {A}mazon {R}iver and its interaction with the large coupled floodplains. {A} high accumulation rate is observed during the 2000-2002 period, followed by decreasing rates until 2005 and by increasing values in 2006 and 2007. {O}ur results suggest that floodplains extending along a river reach of 390 km-long between {I}tacoatiara and {O}bidos trap about 15% of the suspended sediment flux passing at {O}bidos. {T}he simulated deposition rate is of about 0.3 {M}t km(-1) yr(-1) corresponding to an accretion rate of about 27 mm yr(-1).}, keywords = {{S}uspended sediments ; {R}emote sensing ; {S}ediment transport ; {A}mazonian {B}asin ; {S}tatistical modelling ; {AMAZONIE} ; {BRESIL} ; {AMAZONE} {BASSIN}}, booktitle = {}, journal = {{I}nternational {J}ournal of {A}pplied {E}arth {O}bservation and {G}eoinformation}, volume = {21}, numero = {}, pages = {341--355}, ISSN = {0303-2434}, year = {2013}, DOI = {10.1016/j.jag.2012.07.015}, URL = {https://www.documentation.ird.fr/hor/fdi:010058859}, }