Service interruption on Monday 11 July from 12:30 to 13:00: all the sites of the CCSD (HAL, Epiciences, SciencesConf, AureHAL) will be inaccessible (network hardware connection).
Skip to Main content Skip to Navigation
Journal articles

Rainfall control on Amazon sediment flux: synthesis from 20 years of monitoring

Abstract : The biodiversity and productivity of the Amazon floodplain depend on nutrients and organic matter transported with suspended sediments. Nevertheless, there are still fundamental unknowns about how hydrological and rainfall variability influence sediment flux in the Amazon River. To address this gap, we analyzed 3069 sediment samples collected every 10 days during 1995-2014 at five gauging stations located in the main rivers. We have two distinct fractions of suspended sediments, fine (clay and silt) and coarse (sand), which followed contrasting seasonal and long-term patterns. By taking these dynamics into account, it was estimated, for first time, in the Amazon plain, that the suspended sediment flux separately measured approximately 60% fine and 40% coarse sediment. We find that the fine suspended sediments flux is linked to rainfall and higher coarse suspended sediment flux is related with discharge. Additionally this work presents the time lag between rainfall and discharge, which is related to the upstream area of the gauging. This result is an important contribution to knowledge of biological and geomorphological issues in Amazon basin.
Complete list of metadata

Cited literature [37 references]  Display  Hide  Download
Contributor : Isabelle Dubigeon Connect in order to contact the contributor
Submitted on : Monday, May 11, 2020 - 3:00:46 PM
Last modification on : Monday, July 4, 2022 - 9:20:43 AM


Files produced by the author(s)


Distributed under a Creative Commons Attribution 4.0 International License



Elisa Armijos, Alain Crave, Jhan Carlo Espinoza, Naziano Filizola, Raul Espinoza-Villar, et al.. Rainfall control on Amazon sediment flux: synthesis from 20 years of monitoring. Environmental Research Communications, IOP Science, 2020, 2 (5), pp.051008. ⟨10.1088/2515-7620/ab9003⟩. ⟨insu-02569689⟩



Record views


Files downloads