Data/hora: 18/06/2024 13:46:02

Biblioteca(s): | Embrapa Solos.
Data corrente: | 22/11/2002
Data da última atualização: | 22/11/2002
Autoria: | MCKENZIE, N. J.; JACQUIER, D. W.
Título: | Procedures for field sampling and laboratory measurement of saturated and unsaturated hydraulic conductivity on large soil cores.
Ano de publicação: | 0
Fonte/Imprenta: | Canberra : CSIRO -Division of Soils. s.d.
Páginas: | 20p.
Série: | (CSIRO Division of Soils. Divisional Report, 125).
ISBN: | 0-643-05862 1
Idioma: | Inglês
Conteúdo: | Methods for measuring saturated and unsaturated hydraulic conductivity on large intact soil cores are presented. Soil horizons are wet in the field using a trickle irrigation system before excavation and sampling of the large soil cores. A convenient and accurate method for measuring saturated hydraulic conductivity suited to the large cores is then described. The same cores are used for the measurement of usaturated hydraulic conductivity at potentials close to zero. The system uses a drip infiltrometer to supply water at a constant flux. Unit gradient is achieved by adjusting the potential th the lower boundary with an adjustable outflow tube. Matric potential in the core is monitored using tensiometers and water content is measured gravimetrically. Detailed descriptions of the apparatus and calculations are presented. Alternative methods for supplying water using a constant potential device are also considered.
Palavras-Chave: | Growndwater flow; Soils sampling; Solos; Technique; Tecnica.
Thesagro: | Amostragem; Condutividade Hidráulica.
Thesaurus Nal: | Australia; measurement; soil surveys.
Categoria do assunto: | --
Registro original: | Embrapa Solos (CNPS)
Exemplares: | CNPS - (3778-1) - ADD - FL - -- -  -  - 1997.00016 - DIS