Data/hora: 07/06/2024 11:43:24

Biblioteca(s): | Epagri-Sede.
Data corrente: | 21/06/2018
Data da última atualização: | 21/06/2018
Autoria: | BACK, A. J.; ALBERTON, J. V.; POLETO, C.
Título: | Erosivity Index and Characteristics of Erosive Rainfall from the Far Western Region of Santa Catarina, Brazil.
Ano de publicação: | 2018
Fonte/Imprenta: | Journal of Environmental Engineering, Reston, Virginia, EUA, v. 144, n. 7, p. 1-12, 2018.
Idioma: | Inglês

Conteúdo:

The objective of this study was to determine the erosivity index and to characterize the erosive rainfalls with respect to the far
western region of Santa Catarina. Four meteorological stations were used to determine the rainfall erosivity based on the index of the product
of the maximum rain intensity during a 30 min period and the kinetic energy of the rain (EI30), and the equations were adjusted to estimate the
EI30 value from the rainfall coefficient. Erosive rainfalls were classified, according to the pattern of temporal distribution, as Advanced,
Intermediate, and Late rainfall pattern. The erosive rainfalls represent, on average, 83?88% of the annual precipitation, and the value of
EI30 varies from 6,072 to 10,478 MJmmha&#8722;1 h&#8722;1 year&#8722;1. The adjusted equations can be used to estimate the rainfall erosivity in places
with only pluviometric data. Erosive rainfalls presented an average distribution of 51, 31, and 18%, respectively, of the Advanced, Intermediate,
and Late patterns. The maximum rainfall intensity of 30 min with 20% of frequency ranged from 21.8 to 33.6 mmh&#8722;1. For larger
frequency, no significant variation was observed between the time distribution patterns.

Palavras-Chave: | EI30 index; erosivity; soil conservation.
Categoria do assunto: | P Recursos Naturais, Ciências Ambientais e da Terra
URL: | http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_40780.pdf
Registro original: | Epagri-Sede (Epagri-Sede)
Exemplares: | Epagri-Sede - (102353-1) - UPC - AP - DD -  -  -  - DIS