@article{fdi:010071962,
  title = {{R}iver mixing in the {A}mazon as a driver of concentration-discharge relationships},
  author = {{B}ouchez, {J}. and {M}oquet, {J}. {S}. and {E}spinoza, {J}. {C}. and {M}artinez, {J}ean-{M}ichel and {G}uyot, {J}ean-{L}oup and {L}agane, {C}hristelle and {F}ilizola, {N}. and {N}oriega, {L}. and {S}anchez, {L}. {H}. and {P}ombosa, {R}.},
  editor = {},
  language = {{ENG}},
  abstract = {{L}arge hydrological systems aggregate compositionally different waters derived from a variety of pathways. {I}n the case of continental-scale rivers, such aggregation occurs noticeably at confluences between tributaries. {H}ere we explore how such aggregation can affect solute concentration-discharge ({C}-{Q}) relationships and thus obscure the message carried by these relationships in terms of weathering properties of the {C}ritical {Z}one. {W}e build up a simple model for tributary mixing to predict the behavior of {C}-{Q} relationships during aggregation. {W}e test a set of predictions made in the context of the largest world's river, the {A}mazon. {I}n particular, we predict that the {C}-{Q} relationships of the rivers draining heterogeneous catchments should be the most "dilutional" and should display the widest hysteresis loops. {T}o check these predictions, we compute 10 day-periodicity time series of {Q} and major solute ({S}i, {C}a2+, {M}g2+, {K}+, {N}a+, {C}l-, {SO}42-) {C} and fluxes ({F}) for 13 gauging stations located throughout the {A}mazon basin. {I}n agreement with the model predictions, {C}-{Q} relationships of most solutes shift from a fairly "chemostatic" behavior (nearly constant {C}) at the {A}ndean mountain front and in pure lowland areas, to more "dilutional" patterns (negative {C}-{Q} relationship) toward the system mouth. {M}ore prominent {C}-{Q} hysteresis loops are also observed at the most downstream stations. {A}ltogether, this study suggests that mixing of water and solutes between different flowpaths exerts a strong control on {C}-{Q} relationships of large-scale hydrological systems.},
  keywords = {concentration-discharge ({C}-{Q}) relationships ; {A}mazon {R}iver ; {C}-{Q} ; hysteresis loops ; tributary mixing ; spectral analysis ; {AMAZONE} {BASSIN}},
  booktitle = {},
  journal = {{W}ater {R}esources {R}esearch},
  volume = {53},
  numero = {11},
  pages = {8660--8685},
  ISSN = {0043-1397},
  year = {2017},
  DOI = {10.1002/2017wr020591},
  URL = {https://www.documentation.ird.fr/hor/fdi:010071962},
}