SciELO - Scientific Electronic Library Online

vol.10 número2Reflectometria no domínio do tempo na determinação do conteúdo de água no soloAtributos químicos do solo e produtividade do milho afetados por corretivos e manejo do solo índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Revista Brasileira de Engenharia Agrícola e Ambiental

versão On-line ISSN 1807-1929


MELLO, Gláucia de; BUENO, Célia R. P.  e  PEREIRA, Gener T.. Spatial variability of the soil loss, natural potential and erosion risk in intensively cultivated areas. Rev. bras. eng. agríc. ambient. [online]. 2006, vol.10, n.2, pp. 315-322. ISSN 1807-1929.

The objective of this work was to identify the spatial variability of the natural erosion potential, soil loss and erosion risk in two intensely cultivated areas, in order to assess the erosion occurrence patterns. The soil of the area located at Monte Alto, São Paulo state, was classified as Paleudalf (PVA) with moderately slope, with different managements. The soil of the area located at Jaboticabal, São Paulo state, was classified as Haplortox(LV) with gentle slope and cultivated with sugarcane. A irregular grid was imposed on the experimental areas. Soil samples were obtained from 0-0.2 m depth at each grid point: 88 samples in Monte Alto area (1465 ha) and 128 samples at Jaboticabal area (2597 ha). In order to obtain the values of the studied variables USLE was applied at each grid point. Descriptive statistics were calculated, and geoestatistical analyses were performed for defining semivariograms. Kriging techniques to develop map showing spatial patterns in variability of selected soil attributes were used. All variables showed spatial dependence. The PVA soil showed higher erosion risk due to the slope and atual management compared to the soil LV.

Palavras-chave : geoestatistics; USLE [Universal Soil Loss Equation]; soil conservation; soil map.

        · resumo em Português     · texto em Português     · pdf em Português