Dinâmica do uso e ocupação do solo na bacia hidrografica do Rio Teles Pires entre 1986 e 2014

Abstract

This study aimed to assess the spatial-temporal dynamics of land use and occupation during 1986-2014 in the upper Teles Pires watershed through satellite images, remote sensing and GIS techniques. To this end, we used images from Landsat 5 and 8 Thematic Mapper (TM) and a supervised classification was carried out using ENVI 5.0. The evaluation of classification quality was assessed using the free statistical software “R”, from which we obtained the Error Matrix and statistical parameters. From the pre-processing and supervised classification were derived thematic maps for the years 1986, 1989, 1993, 1996, 1999, 2001, 2004, 2006, 2009, 2011 and 2014. It was observed that the main evident changes when comparing the thematic maps were related to agricultural growth. The most variant class during the studded period was bare soil (12.087,78 km² to 42.570,64km²) and Forest (113.244 km² to 80.154,62 km²).The classification accuracy was satisfactory: Kappa and Global accuracy indexes values were higher than 93% for all years; the producer (84-100%) and user (87-100%) accuracies shoed satisfactory values; errors of commission and omission ranged from 0% to 16% and 0% to 13%, respectively.