Conductivity and transit time estimates of a soil liner
A field-scale soil linear was built to assess the feasibilty of constructing a liner to meet the saturated hydraulic conductivity requirement of the U.S. EPA (i.e., less than 1 ?? 10-7 cm/s), and to determine the breakthrough and transit times of water and tracers through the liner. The liner, 8 ?? 15 ?? 0.9 m, was constructed in 15-cm compacted lifts using a 20,037-kg pad-foot compactor and standard engineering practices. Estimated saturated hydraulic conductivities were 2.4 ?? 10-9 cm/s, based on data from large-ring infiltrometers; 4.0 ?? 10-8 cm/s from small-ring infiltrometers; and 5.0 ?? 10-8 cm/s from a water-balance analysis. These estimates were derived from 1 year of monitoring water infiltration into the linear. Breakthrough of tracers at the base of the liner was estimated to be between 2 and 13 years, depending on the method of calculation and the assumptions used in the calculation.
Citation Information
Publication Year | 1990 |
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Title | Conductivity and transit time estimates of a soil liner |
Authors | I.G. Krapac, K. Cartwright, S.V. Panno, B.R. Hensel, K.H. Rehfeldt, B.L. Herzog |
Publication Type | Conference Paper |
Publication Subtype | Conference Paper |
Index ID | 70016190 |
Record Source | USGS Publications Warehouse |