Evaluation of Desertification Processes in Ouricuri-PE Through Trend Estimates of Times Series

Desertification is one of the world´s direst environmental and ecological issue. However, the absence of reliable methods of identifying the processes of desertification is one of the main factors related to the critical study of this topic. This work has a goal to present a model capable of carrying out this task, by using estimation methods on temporal series of images. In this sense, a Landsat TM images were used to evaluate the degradation in Ouricuri, located in the State of Pernambuco, through the techniques of PDI (Image Processing), using the Normalized Difference Vegetation Index (NDVI) and the implementation of methods tendency estimation of temporal series. Thematic maps were produced of the degraded area between the years 1989 and 2009 to evaluate the evolution of this period of desertification, plus the estimation of soil degradation in the year 2019.