ANÁLISE DAS CONDIÇÕES DO RISCO EROSIVO NO ENTORNO DO RESERVATÓRIO DE BALBINA - AM

Abstract

Analysis on erosive risk conditions assist the providence of mitigation techniques and control of landslides, which may impact water resources or lead to great tragedy. In this context, the present article describes a study of the physical properties of soils in the vicinity of Balbina hydroelectric plant in Presidente Figueiredo - AM. The methodology involved georeferencing of local collection of soil samples with GPS - Garmin Etrex, identification of size fractions by the pipette method (Embrapa), systematization and percentages classification of the fractions. The results indicated that the points of greatest risk of erosion are at the base of slopes and embankments. The rates presented silt intervals of 39.42% to 48.42% for tracks hillsides, where erosion was focused. For top areas clay values was evidenced between 44.13% to 58.73% zones of app0earance of smaller erosive incisions. Index Terms – Physical Characterization of soil, Erosive Risk Balbina hydroelectric power plant.