Efeitos dos conflitos de uso do solo em áreas de preservação permanente sobre a produção e transporte de sedimentos em bacias hidrográficas: o caso da bacia do Rio do Coco, Tocantins, Brasil

Abstract

Aimed at evaluate soil use conflicts in permanent preservation areas and their relationship with the production and transport of sediments in the Coco River basin. For that, were analized liquid and solid discharges carried out in the mouth of the main sub-basins, as well mapping of the uses in the PPA areas. The solid discharges were analyzed by collecting water samples to determine suspended solids using vertical integration sampling technique with samplers (DH-48 and DH-59). Flow measurements were performed through flow meters ADV and ADCP. For the mapping of land use and coverage in PPAs, were used images the Landsat 8 satellite, year 2015, being the segmentation of the images realized in the ENVI, with subsequent classification through visual inspection. The results indicated that the region of the high basin presented more irregularities in the PPAs, being also responsible for the higher production and transport of sediments, which suggests a relation with the use activities in the basin.