%0 Journal Article
%T Screening of Sediment Pollution in Tributaries from the Southwestern Coast of the R¨ªo de la Plata Estuary
%A Alicia Ronco
%A Leticia Peluso
%A Mara Jurado
%A Gustavo Bulus Rossini
%J Latin American Journal of Sedimentology and Basin Analysis
%D 2008
%I Asociaci¨®n Argentina de Sedimentolog¨ªa
%X Sediment chemistry and textural properties of transported materials from different surface water basins of South America has recently started to be investigated in relation to provenance materials and pollution sources. The objective of the present study is to analyze and compare pollution burdens in bottom sediments from distal positions of three drainage basins running across urban and industrialized areas and to compare them with more preserved sectors (an upstream position and a water stream with low anthropic influence). The surface bodies of water cross wind and water-reworked substrate materials from the Pampean loess and discharge into the R¨ªo de la Plata. Sampling was done in distal positions of the Luj¨¢n and Riachuelo rivers, Canal Oeste, and Juan Blanco creek, and in Las Flores creek, a tributary of the Luj¨¢n River. Standardized methods for the determination of granulometric parameters, major matrix components, and organic and inorganic pollutants were employed. Assessment of similarities between rivers by Principal Component Analysis show that distal positions of the Luj¨¢n and Juan Blanco rivers and the tributary group together, and that Riachuelo and Canal Oeste split from that group by the effect of the components 1 and 2. The last two bodies of water also split from each other mainly by effect of component 2. Variables contributing most to the separation of these two bodies of water between each other are mainly given by heavy metals and sulfide. A similar behavior is also shown by cluster analysis. Recientemente se han iniciado investigaciones sobre la qu¨ªmica de sedimentos y las propiedades texturales de materiales transportados de diferentes cuencas hidrol¨®gicas de Am¨¦rica del Sur, en relaci¨®n con la proveniencia de los materiales y fuentes de contaminaci¨®n. El objetivo del presente estudio es el de analizar y comparar cargas de contaminaci¨®n de sedimentos de fondo extra¨ªdos en posiciones distales de tres cuencas que atraviesan zonas urbanizadas e industrializadas, y compararlos con sectores m¨¢s preservados (un sector aguas arriba y un arroyo con baja influencia antr¨®pica). Los cuerpos de agua superficial atraviesan sustratos compuestos por materiales retrabajados de origen e¨®lico y fluvial pertenecientes al Loess Pampeano y descargan en el R¨ªo de la Plata. Los muestreos fueron realizados en posiciones distales del R¨ªo Luj¨¢n, Riachuelo, Canal Oeste y Arroyo Juan Blanco, adem¨¢s del Arroyo Las Flores, tributario del R¨ªo Luj¨¢n. Se emplearon m¨¦todos estandarizados para la determinaci¨®n de par¨¢metros granulom¨¦tricos, componentes mayoritario
%K Sedimentos de fondo
%K Composici¨®n matriz
%K Contaminantes
%K An¨¢lisis de componentes principales
%K Bottom sediments
%K Matrix composition
%K Pollutants
%K Principal component analysis
%U http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-49792008000100005