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Conductivity and transit time estimates of a soil liner

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Abstract

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.

Additional Publication Details

Publication type:
Conference Paper
Publication Subtype:
Conference Paper
Title:
Conductivity and transit time estimates of a soil liner
ISBN:
087262756X
Year Published:
1990
Language:
English
Publisher:
Publ by ASCE
Publisher location:
Boston, MA, United States
First page:
820
Last page:
823
Conference Title:
Optimizing the Resources for Water Management - Proceedings of the ASCE 17th Annual National Conference
Conference Location:
Fort Worth, TX, USA
Conference Date:
17 April 1990 through 21 April 1990