Geotechnologies Applied in the Analysis of Vegetable Coverage in of Urbans Permanent Preservation Areas of Jaru, Rondônia

Abstract

The present article evaluates the changes on the vegetation distribution of the 3.83 km2 permanent preservation areas (PPAs) in the urban portion of Jaru city/ RO, which occurred in the period from colonization to the present time (1975 to 2016). For that, images from the Landsat satellites 2, 3, 5 and 8 were used based on geoprocessing techniques to generate spatial information, including field validations, that allowed the mapping of land use and occupation with the delimitation of classes: Urbanization, Anthropized Area and Forest. The data show that in the studied area, in the period of colonization (1975 to 1990), took place intense anthropic activities related to urbanization and agriculture, with a reduction in the distribution of the Forest class by 60.76% in the PPAs, before their delimitations. In the transition period (1990 to 2000), marked by the end of activities of POLONOROESTE and the beginning of PLANAFLORO (both development plans held in Rondônia), had as characteristic the low percentage variations in the indexes of Urbanization (+ 0.18%), Anthropized Area (-0.16% ) and Forest (-1.64%). The delimitations of the PPAs by the Brazilian Forest Code of 2012 in the post-colonization period (2000 to 2016), resulted in an increased distribution of the Forest class by 15.86% in the PPAs, related to its natural regeneration.

Keywords

• Urbans PPAs
• Geoprocessing
• Jaru river