Use of topographic attributes in the erosive susceptibility mapping in the rural area of the municipality of Paranavaí – PR

• Autor(a) principal: Oliveira, José Guilherme de
• Data de Publicação: 2017
• Outros Autores: Nowatzki, Alexei, Santos, Leonardo José Cordeiro
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista Cerrados (Montes Claros. Online)
• Texto Completo: https://www.periodicos.unimontes.br/index.php/cerrados/article/view/1314
• topic: Erosão; Modelo Digital de Terreno; Álgebra de Mapas.; Erosions; Digital Terrain Model; Map Algebra.; Erosión; Modelo Digital del Terreno; Álgebra del Mapas.

The northwest region of the state of Paraná over the last 50 years has suffered several impacts and consequences of linear erosives, ravines and gullies mainly. The occurrence of these processes is mainly associated with two factors: the occupation history of the region, as well as local soil characteristics, mainly the soil texture and a distribution of soils along the slopes. The methodology adopted for the mapping of susceptibility to erosion follows a line of thought developed by Crepani et al. (2001). This proposal defines that the vulnerability of an area is defined by the sum of the vulnerabilities of the components of the physical environment. For the accomplishment of the methodology were selected, to represent the geomorphology, the topographic attributes: slope, curvature plane and profile; for pedology, soil typologies were selected.  The results were discretized in 5 classes, from environments less susceptible to the most susceptible.  The areas of susceptibility to erosion High and Very high, summed represent 24% of the municipality, being that in these portions it concentrates 26% of the area of the erosions, once in these areas the type of soil together with the topographic characteristics make it  more propitious to the occurrence of linear erosive processes.The moderate susceptibility to erosion class represent about 40% of the municipality and 54% of the area of ​​erosive features is concentrated in this unit.