Title Freezing experiments on unsaturated sand, loam and silt loam
Author Watanabe, K.; Kito, T.; Wake, T.; Sakai, M.
Author Affil Watanabe, K., Utah State University, Department of Plants, Soils and Climate, Logan, UT
Source Annals of Glaciology, 52(58), p.37-43, . Publisher: International Glaciological Society, Cambridge, United Kingdom. ISSN: 0260-3055
Publication Date 2011
Notes In English. 19 refs. GeoRef Acc. No: 310213
Index Terms experimentation; freezing; ground ice; ground water; ice; loams; permafrost; sediments; soils; soil temperature; soil tests; temperature; thawing; unfrozen water content; clastic sediments; experimental studies; hydraulic conductivity; loam; retention; sand; saturation; silt; water content
Abstract Estimating soil-water flow during ground freezing is important for understanding factors affecting spring farming, soil microbial activity below the frozen soil, and permafrost thawing behavior. In this study, we performed a column freezing experiment using three different unsaturated soils (sand, loam and silt loam) to obtain a detailed dataset of temperature, water- content and pressure-head change under freezing conditions. The liquid water content and pressure head in the three soils decreased with decreasing temperature. Three soil temperature stages were found: unfrozen, stagnating near 0C and frozen. The temperature and duration of the stagnation stage differed among the soil types. The changes in liquid water content and pressure head during the freezing process were highly dependent on the soilwater retention curve.Water flowed through the frozen area in silt loam and sand, but no water flux was observed in the frozen loam. The freezing soil columns tended to contain more liquid water than estimated from retention curves measured at room temperature, especially at the early stage of freezing.
URL http://www.igsoc.org/annals/v52/58/a58a043.pdf
Publication Type journal article
Record ID 65007350