@article{fdi:010064016,
  title = {{V}aria{\c{c}}ao espa{\c{c}}o-temporal do material inorgânico dissolvido na bacia {A}maz{\^o}nica},
  author = {{S}anchez, {L}. {S}. {H}. and {H}orbe, {A}. {M}. {C}. and {M}oquet, {J}. {S}. and {S}ondag, {F}rancis and {G}uyot, {J}ean-{L}oup},
  editor = {},
  language = {{POR}},
  abstract = {{T}he {A}mazon {R}iver basin is important in the contribution of dissolved material to oceans (4% worldwide). {T}he aim of this work was to study the spatial and the temporal variability of dissolved inorganic materials in the main rivers of the {A}mazon basin. {D}ata from 2003 to 2011 from six gauging stations of the {ORE}-{HYBAM} localized in {S}olimoes, {P}urus, {M}adeira and {A}mazon rivers were used for this study. {T}he concentrations of {C}a2+, {N}a+, {K}+, {M}g2+, {C}l-, {SO}4-2, {HCO}3- and {S}i{O}2 were analyzed. {A}t the stations of {S}olimoes and {A}mazon rivers, the concentrations of {C}a2+, {M}g2+, {HCO}3- and {SO}4-2 had heterogeneous distribution over the years and did not show seasonality. {A}t the stations of {M}adeira river, the concentration of these ions had seasonality inversely proportional to water discharge (dilution-concentration effect). {S}imilar behavior was observed for the concentrations of and {N}a+ at the stations of the {S}olimoes, {A}mazon and {M}adeira rivers, indicating almost constant release of {C}l- and {N}a+ fluxes during the hydrological cycle. {K}+ and {S}i{O}2 showed almost constant concentrations throughout the years and all the stations, indicating that their flows depend on the river discharge variation. {T}herefore, the temporal variability of the dissolved inorganic material fluxes in the {S}olimoes and {A}mazon rivers depends on the hydro-climatic factor and on the heterogeneity of the sources. {I}n the {M}adeira and {P}urus rivers there is less influence of these factors, indicating that dissolved load fluxes are mainly associated to silicates weathering. {A}s the {S}olimoes basin contributes approximately 84% of the total flux of dissolved materials in the basin and is mainly under the influence of a hydro-climatic factor, we conclude that the temporal variability of this factor controls the temporal variability of the dissolved material fluxes of the {A}mazon basin.},
  keywords = {weathering ; hydrochemistry fluxes ; theoretical dilution ; hydrodimatology ; {BRESIL} ; {AMAZONIE} ; {AMAZONE} {BASSIN}},
  booktitle = {},
  journal = {{A}cta {A}mazonica},
  volume = {45},
  numero = {2},
  pages = {175--185},
  ISSN = {0044-5967},
  year = {2015},
  DOI = {10.1590/1809-4392201402722},
  URL = {https://www.documentation.ird.fr/hor/fdi:010064016},
}