期刊
HYDROLOGICAL PROCESSES
卷 24, 期 21, 页码 2977-2982出版社
WILEY
DOI: 10.1002/hyp.7711
关键词
electrical resistivity tomography; undisturbed field soil; monitoring; matrix flow; preferential flow
资金
- Ministry of Environment, Korea
- Korea Institute of Geoscience and Mineral Resources
An accurate prediction of solute infiltration in a soil profile is important in the area of environmental science, groundwater and civil engineering. We examined the infiltration pattern and monitored the infiltration process using a combined method of dye tracer test and electrical resistivity tomography (ERT) in an undisturbed field soil (1 m x 1 m). A homogeneous matrix flow was observed in the surface soil (A horizon), but a preferential flow along macropores and residual rock structure was the dominant infiltration pattern in the subsurface soil. Saturated interflow along the slopping boundaries of A and C1 horizons and of an upper sandy layer and a lower thin clay layer in the C horizon was also observed. The result of ERT showed that matrix flow started first in A horizon and then the infiltration was followed by the preferential flows along the sloping interfaces and macropores. The ERT did not show as much detail as the dye-stained image for the preferential flow. However, the area with the higher staining density where preferential flow was dominant showed a relatively lower electrical resistivity. The result of this study indicates that ERT can be applied for the monitoring of solute transportation in the vadose zone. Copyright (C) 2010 John Wiley & Sons, Ltd.
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