Geological influence in the fluvial dynamics of the hydrographic Cachoeirinha stream, Cáceres, Mato Grosso

Abstract

The purpose of this work is show the geological description and analyze your interrelationship with the river Cachoeirinha dynamics. The hydrographic basin of this river can be located in the southeast of the Mato Grosso State and the northeast of the Cáceres city. Tributary of the left bank of the Paraguay River. It covers 944,104 km, whose springs are in the slopes and hillsides in a region of Mountainous Province, between the geographical coordinates 15º 35’ 37”, 16º 12’ 30” S, 57º 14’ 36” and 57º 32’ 24” W. The methodological procedures begin with de word of cabinets and subsequent field research. For show different physical characteristics the area of the basin was divided into three sectors: high, medium and low course, being delimited between four topographic charts of Ministério do Exército (1975) in scales of 1:1.000.000 of project’s report RADAMBRASIL (1982). These results showed that the basin is based on formations: Sepotuba, Raizama and Araras on the right course; Pantanal, Sepotuba, Araras and Raizama in the medium course, the current alluviums and the formation of Pantanal on the low course in which it interferes directly in river dynamics on the long of basin, so: on availability of sources, of rivers channels, on the flow pattern, and on channel morphology.