Erosividade e características hidrológicas das chuvas de Viçosa (MG)

Resumo

The objective of this study was to determine the hydrological characteristics and erosivity of rainfalls in Viçosa, MG from 1982 to 2001. For each erosive rainfall the time, rainfall accumulated, and the processed data was entered in a spreadsheet, where the EI30 index, the total monthly and annually, and the pattern of the erosive rainfall were calculated. Rainfall graphics of intensity, duration, and frequency were made. Annual erosive index of Viçosa is 7.601 MJ mm ha -1 h -1 ("R" Factor USLE). The rainfall advanced pattern presented great results to all parameters analyzed, followed in descending order by the rainfall intermediate and rainfall late. The rainfall advanced corresponded to 60% of the total rainfall analyzed, the rainfall intermediate with 24% and 16% to rainfall late.

Descrição

Palavras-chave

Chuvas erosivas, Perfil de precipitação, Energia cinética, Erosive rainfall, Kinetic energy, Precipitation profile

Citação

EVANGELISTA, Adão Wagner Pêgo; VIEIRA, Marcos Antônio; SILVA, Marciana Cristina da; SOUZA, Jorge Luiz Moretti de. Erosividade e características hidrológicas das chuvas de Viçosa (MG). Irriga, Botucatu, v. 17, n. 4, p. 456-468, out./dez. 2012.