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Estudio del tamaño de las partículas en suspensión en relación con el caudal y la concentración de sedimento en una cuenca de montaña

Authors: Gallart Gallego, Francesc; Regüés-Muñoz, D.; Soler, M.;

Estudio del tamaño de las partículas en suspensión en relación con el caudal y la concentración de sedimento en una cuenca de montaña

Abstract

[EN] This study shows presents the dynamics of suspended sediment transport at the the results of suspended sediment sampling at three gauging stations in the Vallcebre experimental basins (Eastern Pyrenees). The paper analyses particle size distribution of the automatically collected sediment samples during three seasons: The work analyses particle size characteristics of sediments collected by three automatic samplers in different seasons (spring, summer and autumn). Highest Peak suspended solids concentrations measured exceeded 100 g l- 1. Texture of The transported sediments consist consisted mainly of fine silt, with low percentages of clay and very low fractions of fine sand. PPositive correlationss werewere found between particle size and water d i s c h a rge, whereas correlations between particle size and sediment concentration were only were hardly significant in one of the catchment. In the study area, the particle size of transported suspended sediments, larg e l y depends on the lithological material of the catchments. However, hydrological this headwaters area, the original material source is the main control of the particle size in suspended sediments transported by streams, although the transport processes, deposition and re-erosion phenomena, produced their the fractioningfractioning and erosion of particles.

[ES] Se presentan los resultados del muestreo automático del sedimento transportado en suspensión en tres estaciones de aforo instaladas en las cuencas experimentales de Vallcebre (Pirineo Oriental). Este trabajo analiza el tamaño de las partículas de sedimento recogidas por los muestreadores en tres de las estaciones del año (primavera, verano y otoño). Las máximas concentraciones de sedimento observadas han llegado a superar los 100 g l- 1. Los sedimentos transportados son mayoritariamente limo fino, con porcentajes bajos de arcilla y muy bajos de arena fina. Se han encontrado correlaciones positivas entre el tamaño de las partículas y el caudal en los respectivos aforadores mientras que la relación entre el tamaño de las partículas y la concentración de sedimentos sólo es significativa en la cuenca principal. En esta zona de cabecera, la fuente del material de origen es la que determina el tamaño de las partículas transportadas, aunque los procesos de transporte, sedimentación y re-erosión producen su desgaste y fraccionamiento.

Este trabajo ha sido realizado mediante la financiación de los proyectos HIDROESCALA (REN2000-1709/GLO), PROHISEM (REN2001- 2268/HID) y el acuerdo CSIC-DGCONA (RESEL). Agradecemos a Oscar Ávila y Xavier Huguet su ayuda con los instrumentos y la recogida de datos y muestras. Los comentarios de dos revisores anónimos han ayudado a mejorar el manuscrito original

Peer reviewed

Keywords

Artículos de Investigación, Concentración de sedimento, Sediment concentration, tamaño de las partículas, caudal, Tamaño de las partículas, Sedimento en suspensión, Discharge, Caudal suspended sediment, Particle size, concentración de sedimento, sedimento en suspensión

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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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