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	Provedor de dados Scientia Agricola (2) Autor Hu,Wei (2) Reichardt,Klaus (2) Shao,Ming An (2) Wang,Quan Jiu (2) Fan,Jun (1) Palavra-chave Coefficient of variation (1) Correlation length (1) Disc infiltrometer (1) Pressure head (1) Spatial structure (1) Steep sloping land (1) Surface soil moisture (1) Temporal stability (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2008 (2) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Soil water content temporal-spatial variability of the surface layer of a Loess Plateau hillside in China Scientia Agricola Hu,Wei; Shao,Ming An; Wang,Quan Jiu; Reichardt,Klaus. Surface soil moisture exhibits an important variability in terms of spatial and temporal domains, which may result in critical uncertainties for agricultural water management. The purposes of this study were (i) to characterize the temporal dynamics and stability of the spatial variability of the surface 0-6 cm soil water content θon a hill-slope; (ii) to investigate issues related to soil moisture conditions including dominating factors on soil moisture and to the estimation of the mean θ. During a period of more than one month θwas measured on thirteen days by Frequency Domain Reflectometry using a 10 x 10 m grid of measurement points covering a 60 x 280 m domain within a hill-slope of the Loess Plateau in China. Soil water content exhibited a moderate... Tipo: Info:eu-repo/semantics/article Palavras-chave: Surface soil moisture; Coefficient of variation; Correlation length; Temporal stability. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000300008 Spatial variability of soil hydraulic properties on a steep slope in the loess plateau of China Scientia Agricola Hu,Wei; Shao,Ming An; Wang,Quan Jiu; Fan,Jun; Reichardt,Klaus. The understanding of the structure of the spatial variability of soil surface hydraulic properties on steep slopes is important for modeling infiltration and runoff processes. The objective of this study was to investigate the spatial variability of these properties on a steep slope of the Loess Plateau in northwest China. A 9600 m² area was systematically sampled in a grid of 106 points spaced 10 m x 10 m. Hydraulic properties were determined with a disc infiltrometer under multiple pressure heads (-15, -9, -6, -3, 0 cm) at each sample point. Classical and geo-statistical methods were used for data analysis. The results indicated that the variation of Gardner's a and hydraulic conductivities at all applied pressure heads was moderate and the heterogeneity... Tipo: Info:eu-repo/semantics/article Palavras-chave: Disc infiltrometer; Steep sloping land; Pressure head; Spatial structure. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000300007 Registros recuperados: 2 Primeira ... 1 ... Última

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