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Cross sectional variation in the chemistry and suspended sediment load of the orinoco river at ciudad bolivar venezuela

Cross sectional variation in the chemistry and suspended sediment load of the orinoco river at ciudad bolivar venezuela

Acta Cientifica Venezolana 35(5-6): 382-385

Samples were taken at numerous points across the Orinoco River at Ciudad Bolivar. The samples were collected on three different dates; 2 during the season of low water (March) and one during the season of high water (Sept.). Total particulates showed strong patterns of distribution both at high and low water. Particulate concentrations in the bottom 2/3 of the central portion of the cross section were as much as 2-3 times higher than particulate concentrations near the surface or the sides of the river. These were no major patterns in distribution of soluble ions at low water but there was a substantial increase from south to north across the river during high water, even though the nearest major tributary is 170 km upstream. The data show that integrating samplers msut be used to characterize the soluble ion chemistry and suspended load of the Orinoco.

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