Preventive management of natural resources, aimed at planning to ensure future sustainability, seeks to resolve conflict situations and apply control measures so that they have the least possible impact. This should be the priority of the state of Pará due to the reduction of the potential of natural resources in front of the annual agriculture advance. In this perspective, this monograph brings its contribution to the environmental management of degraded areas caused by the expansion of agriculture in Ulianópolis, Pará, through the analysis of the use of remote sensing and geoprocessing techniques, in order to identify the barriers and challenges to reach the sustainability. In order to reach the objective, the methodologies of quantification and mapping were the land use and land cover areas provided by the TerraClass Project for the years 2004 to 2014, analyzing the dynamics of land use and coverage and comparisons between the Mapping of the areas and also the methodology of revision of the specialized literature, To evaluate relevant studies in this specific theme of the expansion of agriculture and possible solutions to their problems. In the results it was clear that there are many alternatives to contain the expansion of agriculture over the forest, without leaving the social and economic issue aside. It should be noted that the forest class was reduced from 210,494 ha (41%) in 2004 to 158,068 ha (31%) in 2014. Annual agriculture represented an increase from 13,805 ha (3%) in 2004 to 47,244 ha (%) in 2012. In the period from 2004 to 2014, the forest class loses 6.557 ha (3.12%) for annual agriculture and 15,561 ha (7.39%) for pasture. In the period from 2012 to 2014 the forest class loses for the annual agriculture 23 ha (0,01%) and for the pasture class 1,193 ha (0,75%). It is concluded that pasture and annual agriculture classes are advancing over forest areas. Despite being a traditional region of implantation of the annual agriculture, the municipality of Ulianópolis continues suffering a great loss of the forest resources, being, including the deforestation one of the biggest problems in the region. And that in the face of the problems exposed, there are innumerable solutions, which are more or less complex, but possible to be applied in the municipality of Ulianópolis. Thus, to reduce the environmental problem caused by anthropic action, the application of only one of the measures would not be efficient, and it is necessary that all the social actors involved engage to implement these measures.
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