Application of geospatial analysis for characterization of terrain fragility
DOI:
https://doi.org/10.51359/2238-6211.2019.238451Keywords:
fragility; erosion; cerrado; settlement; land useAbstract
Knowledge about the fragility of the terrain is one of the main instruments in territory planning considering its use in the management of land occupation. The aim of this study was to diagnose fragility of the terrain to erosive processes in the Grande Stream basin located in the Carimã Agricultural Settlement, Rondonópolis, State of Mato Grosso, Central Brazil. The methodology was based on thedetermination of the susceptibility of the terrain, where weights were assigned to the different factors. After the factor mapping, the QGIS raster tool was used to overlap the maps. In the Grande Stream basin, 71.5% of the area was characterized by low to moderate susceptibility, where soil type, land use and slope were important factors and determinant of low fragility. The regions with the lowest indices of susceptibility had the natural vegetation cover preserved. The central region of the basin, wherethere are higher degrees of terrain slope, soil with lower firmness, extensive pasture and soil exposure, achieved high susceptibility values. The results serve as a preliminary methodological proposal for rural settlements to better understand the area, benefiting the social safety of the settlers, natural resources and biodiversity.
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