This paper presents a methodology of evaluation of hillslopes fragility focussing the relations between soils properties and hillslopes characteristics. The methodological proposal as based on the use of detailed characteristics of the environment that interfere in the maintenance of the equilibrium of the relief, in natural conditions or in areas where the human intervention has altered the superficial dynamics and had developed processes of desestability of hillslopes.
The methodological approach, use the correlation among hillslopes units, inclinations and landuse, making a map of potential fragility. In other side, had been soils profiles and collected soil samples. These samples had been analysed in physical characteristics (granulometric sizes, mud content, plastic and liquid limits). Others experiments as coesion coefficients, had been in field works using Pocket Penetrometer.
As a result of the research cartographic documents had been produced. The Landuse Map had been using aerial photographs and controlled in field works. The Hillslope Inclination Map had made using topographic maps and degree ruler, and the Geomorphological Map had been using aerial photos, topographic maps and controlled in field works. After maps construction, correlationships between spatial information obtained had made with the information of soils samples and soils experiments, making a new map: The Fragility Map of Hillslopes.
This map has analysed focussing the fragility of hillslopes in function of distinct landuses. The results has demonstrated that it is possible the application of this methodology in humid tropical areas, being indicated for studies of physical territorial planning in detailed scales.