Mudanças em perfis transversais em trecho do Rio Primeiro de Janeiro, Romelãndia/SC: relações com a precipitação no período de outubro de 2014 a agosto de 2015

Abstract

Erosion, transport and deposition processes are fundamental to understanding the shape of river courses. This study aims to understand the relationship between rainfall and erosion/aggradation processes in the Primero de Janeiro river reach, in the municipality of Romelândia, western of Santa Catarina State.From September 2014 to August 2015 data were collected in 5 cross-sections using for this purpose the technique of successive cross-sections in the river reach. Rainfall was also measured using a simple pluviometer installed near the study site. These rain data were used to discriminate between periods of high and low precipitation, and thus relate them to the change in the channel.The cross-sections were used to quantify the aggradation or erosion processes and in which locations occurred in the channel.The survey revealed that the aggradation and erosion processes are interspersed with a major trend toward erosion in the studied river reach.