INVESTIGADORES
LECOMTE Karina Leticia
artículos
Título:
Influence of geomorphological variables on mountainous stream water chemistry (Sierras Pampeanas de Córdoba, Argentina)
Autor/es:
LECOMTE, K.L.; GARCÍA, M.G.; FORMICA, S.M.; DEPETRIS, P.J.
Revista:
GEOMORPHOLOGY
Editorial:
Elsevier
Referencias:
Año: 2009 vol. 110 p. 195 - 202
ISSN:
0169-555X
Resumen:
The relationship between geomorphological features and water geochemistry was studied for a group of mountainous rivers (from ~900 to ~2200 m a.s.l.) with similar geology and climate, in the Sierras Pampeanas of Córdoba (Argentina, 31° 30´, 32° 00´S, and 64° 30´, 65° 10´W). A multivariate approachwas used to identify three morphological domains that describe the set of sampled rivers, namely "size" dominance, slope dominance, and drainage density dominance. The links between physicochemical and geomorphological variables show that "size" dominance is mostly related to major ions, conductivity, and pH,which tend to increase downstream. Slope dominance is associated with the total concentration of heavy metal (i.e., high heavy metal concentrations are associated with relatively flat areas with slightly acid to circumneutral pH, which promotes desorption). The drainage density dominance results in an association between well-drained catchments and low Cl− drainage density dominance results in an association between well-drained catchments and low Cl− drainage density dominance. The links between physicochemical and geomorphological variables show that "size" dominance is mostly related to major ions, conductivity, and pH,which tend to increase downstream. Slope dominance is associated with the total concentration of heavy metal (i.e., high heavy metal concentrations are associated with relatively flat areas with slightly acid to circumneutral pH, which promotes desorption). The drainage density dominance results in an association between well-drained catchments and low Cl− drainage density dominance results in an association between well-drained catchments and low Cl− morphological domains that describe the set of sampled rivers, namely "size" dominance, slope dominance, and drainage density dominance. The links between physicochemical and geomorphological variables show that "size" dominance is mostly related to major ions, conductivity, and pH,which tend to increase downstream. Slope dominance is associated with the total concentration of heavy metal (i.e., high heavy metal concentrations are associated with relatively flat areas with slightly acid to circumneutral pH, which promotes desorption). The drainage density dominance results in an association between well-drained catchments and low Cl− drainage density dominance results in an association between well-drained catchments and low Cl− drainage density dominance. The links between physicochemical and geomorphological variables show that "size" dominance is mostly related to major ions, conductivity, and pH,which tend to increase downstream. Slope dominance is associated with the total concentration of heavy metal (i.e., high heavy metal concentrations are associated with relatively flat areas with slightly acid to circumneutral pH, which promotes desorption). The drainage density dominance results in an association between well-drained catchments and low Cl− drainage density dominance results in an association between well-drained catchments and low Cl− size" dominance is mostly related to major ions, conductivity, and pH,which tend to increase downstream. Slope dominance is associated with the total concentration of heavy metal (i.e., high heavy metal concentrations are associated with relatively flat areas with slightly acid to circumneutral pH, which promotes desorption). The drainage density dominance results in an association between well-drained catchments and low Cl− drainage density dominance results in an association between well-drained catchments and low Cl− size¡± dominance ismostly related to major ions, conductivity, and pH,which tend to increase downstream. Slope dominance is associated with the total concentration of heavy metal (i.e., high heavy metal concentrations are associated with relatively flat areas with slightly acid to circumneutral pH, which promotes desorption). The drainage density dominance results in an association between well-drained catchments and low Cl− drainage density dominance results in an association between well-drained catchments and low Cl− flat areas with slightly acid to circumneutral pH, which promotes desorption). The drainage density dominance results in an association between well-drained catchments and low Cl−− concentration (i.e., preserving the chemical signature of atmospheric precipitation).