Avaliação do transporte de carga sedimentar no médio rio Araguaia

Abstract

The study estimates the bed load sediment in the middle Araguaia River, through the height and dunes daily displacement. The studied region is located between the mouth of the Crixás-Açú River and the Bananal Island, Goiás. The dunes migrated at the rate of 7 m/day, the average water velocity was 1.25 m/sec, corresponding to a total transport of 2195.60 ton of bed load/day. Two methods were compared in order to verify possible sources of error, the Van Rijn one showed a difference of 1414 tons less then the Struckrath method, difference of 0,06% in the estimated bed load between both methods. Results were compared with the bed load of the Araguaia River in the region of Aruanã.