Methods of Soil Water Collection at Different Matric Suctions
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概要
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To investigate the transport mechanism of solutes in soil water in the unsaturated zone, collection of soil water samples having different matric potential is necessary. Three methods originally developed for the purpose of measuring matric suction, i. e., the centrifuging, the pressure membrane, and the vapor pressure depression methods, were used to extract soil water samples under different matric potentials. The time to attain an equilibrium between the pressure of soil water and a given matric suction (pF 3.0 or 4.2) was much faster by the centrifuging method than by the pressure membrane method. The soil water sample with matric potential of pF 4.2-6.8 was extracted by the vapor pressure depression method under the regulated temperature of 110°C (Fig.5). By combining these three methods, three soil water samples having different matric potential ranges were collected from each soil sample with satisfactory accuracy.
- 日本陸水学会の論文
日本陸水学会 | 論文
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