The present study deals with the environmental fragility aspects of the Ribeirão
Taquaruçu Grande watershed, located in the center-south portion of the municipality
of Palmas, capital of the State of Tocantins. In the methodology, Geoprocessing
techniques were used in the analysis of physical and anthropic data, such as: slope,
soil, geology and land use and occupation. These data are considered as important
variables in the definition of the environmental fragility of the study area. For these,
weights and cross-references were assigned to each other via ArcGis software
version 10.5.1, generating the final map. As a theoretical assumption, it was based
on the foundations of the methodology developed by Ross (1994) that concerns the
integrated analysis of natural and human resources. In general, the results showed
that 46% of the area presents medium low risk, followed by 13.90% of medium risk,
8.19% presented high risk and 5.28% corresponded to very high risk. In the same
sense, it was observed that the variables employed were preponderant in
determining the environmental fragility of the area and that the adopted methodology
is an important instrument of support to the planning and environmental management
organs of the municipality, allowing a better understanding of the natural dynamics of
the river basin. Ribeirão Taquaruçu Great for making decisions.
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