Dinâmica do uso e ocupação do solo no município de Arcoverde - PE usando sensoriamento remoto

Abstract

The semi-arid region of Brazil is very vulnerable to climate variability, and particularly to its extremes. Changes in land use and occupation, caused by anthropic actions, have generated great impacts on landscapes and surface temperatures. These impacts can be mitigated through the monitoring of land use and cover using spatiotemporal information of changes occurring in the landscape. Therefore, this study aims to map the dynamics of land-use change and vegetation cover in the period between 1985 and 2015, as well as the spatial-temporal dynamics of the night surface temperature in the municipality of Arcoverde, Sertão de Pernambuco. For the study, annual rainfall data were analyzed and categorized by the quantile method in very dry, dry, normal, rainy and very rainy years, and data from the MODIS sensor surface temperature (EARTH and AQUA) data set Series View platform. Images of the night surface temperature of the MODIS - MOD11C3 (2000-2015) and MYD11C3 (2002-2015) products were used to obtain the average night surface temperature of the period evaluated in the study region. Images of the Landsat 5-TM satellite in orbit / point 215/66 for each analyzed year were obtained and grouped according to the categories of the quantiles. The images were processed and analyzed in software SPRING 5.2.6 / INPE, in which the MAXVIER multispectral classification techniques "pixel to pixel" were applied to the classification of the image regarding land use. It was observed the temperature increase in the entire study area, regardless of the class of use and occupation of the soil. The samples of urban area and exposed soil are responsible for the greatest thermal increases to the local atmosphere.