Hydrodynamic and sedimentary composition on the Jacobina stream, municipality of Cáceres, MT, Pantanal

Abstract

This study aimed to evaluate the influence of the geology and the land use and occupation on the granulometric composition of the sediment of the watershed Jacobina’s Stream, in Cáceres, MT, Pantanal. Therefore, the basin was compartmentalized into high, medium and low course considering the geomorphological aspects, where sediment and water samples were collected in each site to analyze the granulometric particulates and suspended sediments on the water in the wet season (February/2015) and the dry season (July/2015). The sediment samples were collected using a Van Petersen dredger and for the water samples a Van Dorn Bottle were used. Data about the depth and width of the channel, water flow and the height of the shore were also performed. The results of the bottom sediment have been shown the Jacobina’s stream deposit coarse particle size as such as coarse and medium sand and the fine material tends to remain suspended in both 1 and 2 sites. At the site 3 the deposited material it is fine as such as fine sand and silt. The width and the depth of the channel decreased from the wet to the dry season and the water flow consequently. The data have shown that the type and the amount of the sediment found at the sampled sites, might be influenced by the geologic material and the land use and occupation around at the basin.