Avaliação de técnica alternativa para contenção da erosão: estudo de caso da Bacia do Rio Taquari, Araguatins - TO

Abstract

The Taquari River 40 km long river is the main responsibility for water supply, along with the Araguaia River, the city of Araguatins situated in the micro region of the nozzle from the extreme north of the state of Tocantins Parrot. Strong pressure from the agricultural sector promotes an intense exploration of the land which has generally led to destruction of riparian forests favoring the increase of erosion and siltation as a result of the watercourse. This study aimed to conduct a study of soil losses in erosion of margins Taquari, with the aid of Equation Universal Soil Loss - USLE / USLE, besides using the terracing with waste tires - TEPI in order reducing the velocity of the laminar flow and promote potential environmental and health benefits by reducing the number of discarded tires along the municipality. For this study, we used: i) determining the contour lines of the area; ii) installation of barriers with waste tires and water storage box; iii) construction of pipeline to transport water from runoff; iv) determining the components of the universal soil loss equation; v) application of USLE. It was found that the use of TEPI could retain around 60% of the soil that would be adduced to the river Taquari showing a strong tendency to contain sedimentation, beyond the visible development of vegetative growth. It was also noticed an increase in the pH of the soil water plus calcium levels (8%), the sum of the bases (60%) and saturation bases (2.7%).