EVALUATION OF INFLUENCING FACTORS ON THE VULNERABILITY OF SOIL EROSION THROUGH THE MULTICRITERIA DECISION MAKING AND TECHNIQUES GEOPROCESSING COUNTY OF PIRATINI – RS

Roberta Aparecida Fantinel, Ana Caroline Paim Benedetti

Abstract


The land degradation is the loss of their natural , physical and biochemical qualities , caused mostly by erosion , which leads into a socioeconomic and environmental problem. The objective was to assess the vulnerability of soil erosion in Piratini-RS, according to some potentially influence environmental characteristics of this occurrence anthropogenic. For this environmental assessment we used maps of the following themes: land use, soil science, geology and slope. According to the methodology proposed by Xavier-da-Silva (2001), which considers the multicriteria analysis, the scores were assigned from 1 (very low vulnerability) to 10 (highest vulnerability) to the constituent classes of these maps. The results showed that the use of classes " above ground " and " field " are the most vulnerable to erosion, as well as the slopes of class " 12-20 %" and " 5-12 %". The areas with high vulnerability of erosion represent 72,07 % of the Piratini municipal area, while 26,71 % represent areas of highest vulnerability of erosion and 1,22 % median vulnerability of soil loss.




DOI: http://dx.doi.org/10.5902/2179460X19783

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