Avaliação da desertificação com indicadores biofísicos e econômicos no Cariri Ocidental Paraibano (1999 a 2019).

Abstract

The desertification process is understood as a complex phenomenon of reduction of soil edaficaproperties, resulting in multiple problems in the food production of populations. The objective of this work was to analyze the desertification process in the municipalities of Cariri oriental Paraibano from 1999 to 2019 with biophysical indicator databases and data on economic vulnerability. The research was carried out based on a bibliographic survey of the theme; observation of images of landsat 5 TM and Landsat 8 ETM+ satellites from 1999 to 2019 for product production: Normalized Difference Vegetation Index (IVDN), Surface Albedo and TGSI (Topsoil Grain Size Index) the treatment was in the “software” Arcgis10.2, ; IBGE data on agricultural sense and extractivism vegetable; an on-site study was also carried out in the municipalities of Barra de São Miguel, Boqueirão and Cabaceiras to validate the products. The results pointed to a reduction in vegetation cover, and that this reduction is shown in low NDVI values and high TGSI values, as were albedos of the surface. It is concluded that during the analysis period the vegetation cover has been removed significantly for various purposes.