Potencial natural de erosão hídrica para o estado de Mato Grosso

• Autor(a) principal: Di Raimo, Luis Augusto Di Loreto
• Data de Publicação: 2017
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFMT
• Texto Completo: http://ri.ufmt.br/handle/1/4219
• topic: USLE; Erosividade; Erodibilidade; Conservação do solo; Perda de solo; SIG; CNPQ::CIENCIAS AGRARIAS; USLE; Erosivity; Erodibility; Soil conservation; Midwest

The objective of the present work was to estimate the spatial variability of the natural potential erosion (NPE) for Mato Grosso state. The specifics objectives were: estimate the spatial variabilities of erosivity (EI30 and R), erodibility (K) and obtain a map for topografic factor LS. After obtaining the maps, these were combined (multiplied) using ArcGIS software. This combination generated as final product the PNE map. The mean value of R for State is classified as high and equivalent to 8835 MJ mm ha-1 year-1 . 91% of annual erosivity is concentrated in the months of October to April. The Mato Grosso state has in most of its territory (98%) low and medium erodibility soils. The most critical areas (high erodibility) occupy 1.95% of the State. The values of topographic factor LS ranged from 0 to 4.6, with predominance of values ranging from 0 to 1 (95.13% of state territory). In the Mato Grosso state occur soils with PNE in the low, middle and high classes (20%, 58% and 22%, respectively). The areas of high PNE are considered critical and present higher proportions in the northwest (46.69%), northern (32.70%) and western (30.06%) macro regions. The large extensions of high PNE, in north of the west macro region, used with agriculture, characterize a problematic region, where the annual rates of soil loss should be monitored.