Abstract
This study aimed to conduct environmental diagnostics of areas with high potential environmental fragility in the Federal District, Brazil. Reclassified thematic maps of soil slope and vulnerability to water erosion were combined to create the soil susceptibility map to water erosion, which, in turn, was combined with the thematic maps of soil use and rain erosivity. The result was then reclassified, giving rise to the potential environmental fragility map. In the places identified with high potential environmental fragility, information was collected by observing the aspects of the physical, biotic, and anthropogenic environmental components of the landscape. Areas with high potential environmental fragility in the Federal District were found. In those locations, the uses and occupations of the soil observed were intensive farming, small rural activities, managed intensive livestock and degraded intensive livestock. Land use and occupation in areas with high potential environmental fragility of the Federal District, with “degraded intensive livestock”, make such sites environmentally fragile since there is a scarcity of non-preserved natural areas and there is no soil conservation method. It was concluded that, for the use and occupation of the soil with high potential environmental fragility areas in the Federal District, which are taken by intensive farming, small rural activities, and managed intensive livestock, the conservation of the natural areas and the vegetative and mechanical soil conservation techniques must be implemented.
Highlights
Environmental fragility is defined as the natural vulnerability of the environment associated with the protection or not that different land uses are capable of promoting over a given area (SCHIAVO et al, 2016)
Environmental fragility is based on the Ecodynamic Units predicted by Tricart (1977) within an ecological conception, in which the environment is analyzed on the Theory of Systems, which assumes that in nature, the exchange of energy and matter takes place through dynamic balance relations, that in turn is often altered by anthropogenic interventions of environmental components, generating moments in environments of temporary or even permanent imbalances
With the analysis of the information collected in the places identified with high potential environmental fragility in the Federal District, it can be seen that:
Summary
Environmental fragility is defined as the natural vulnerability of the environment associated with the protection or not that different land uses are capable of promoting over a given area (SCHIAVO et al, 2016). Environmental fragility is based on the Ecodynamic Units predicted by Tricart (1977) within an ecological conception, in which the environment is analyzed on the Theory of Systems, which assumes that in nature, the exchange of energy and matter takes place through dynamic balance relations, that in turn is often altered by anthropogenic interventions of environmental components, generating moments in environments of temporary (unstable) or even permanent (stable) imbalances. On the concepts of Tricart (previously mentioned), Ross (1990) inserted criteria to define the Stable and Unstable Ecodynamic Units (SEU and UEU, respectively), which will define potential environmental fragilities associated with the natural vulnerabilities of the environments, and emerging environmental fragilities, associated with the natural vulnerabilities of the environments and the protections corresponding to the types of land use and vegetation cover. The UEUs that underwent anthropogenic interventions intensely modified natural environments through deforestation and practices of diverse economic activities
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