Detecção da variação de cobertura vegetal a partir da estimativa do índice de vegetação por diferença normalizada (NDVI) na Unidade de Conservação do Parque Estadual das Carnaúbas - CE com utilização de técnicas do sensoriamento remoto

Abstract

Despite efforts to ensure the preservation and conservation of the Caatinga in recent years, this biome continues to be the target of unsustainable and harmful practices. For the monitoring of the vegetation cover in the exposed study area, the Nomalized Difference Vegetation Index (NDVI) was calculated using satellite images Landsat 4-5 sensor Thematic Mapper (TM) for the years 1986 and 2006; and satellite Landsat 8 sensor Operational Terra Imager (OLI) / Thermal Infrared Sensor (TIRS) for the year 2018. The NDVI values were estimated and their statistical parameters (mean, standard deviation and variance) used to detect the variation in vegetation cover. The differences between the annual values allowed a balance of additions and reductions for each class of vegetation within the study region. Based on the observed results, NDVI showed being an efficient indicatorin the aid of environmental monitoring studies of flora, encompassing Geotechnologies.