SUSCEPTIBILITY AND HAZARD EROSION MAPPING AND EROSIVE SCARS INVENTORY IN PERNAMBUCO NORTHERN FOREST AREA

Abstract

The prediction of erosion processes has been an improvement from the use of Geographic Information Systems (GIS), highlighting the multi-criteria analysis, that make it possible to integrate various conditions (eg, climate, slope, soil, lithology, land use, among others) of these processes. The aim of this study is to identify the areas of greatest danger to erosion of the city of Aliança, Northern Zona da Mata, Pernambuco, where is the common occurrence of erosive features, from the association between the letter of susceptibility and the letter of land, by validating the from the overlap with an inventory of erosive scars. The letter of susceptibility was achieved through a systemic analysis of the natural conditions and the use and occupation of the Earth by photointerpretation of satellite imagery, all municipal scale. The results indicated that although there are highly erodible soils in the municipality, the ability of rain erode them is relatively low, revealing other conditions (e.g. pedological cover) and man-made factors have played an important role in the generation of erosive processes.