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Construction and performance of a long-term earthen liner experiment

By:
,
Edited by:
Rudolph Bonaparte

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Abstract

In land burial schemes, compacted soil barriers with low hydraulic conductivity are commonly used in cover and liner systems to control the movement of liquids and prevent groundwater contamination. An experimental liner measuring 8 x 15 x 0.9 m was constructed with design criteria and equipment to simulate construction of soil liners built at waste disposal facilities. The surface of the liner was flooded with a 29.5 cm deep pond on April 12, 1988. Infiltration of water into the liner has been monitored for two years using 4 large-ring (1.5 m OD) and 32 small-ring (0.28 m OD) infiltrometers, and a water-balance that accounts for total infiltration and evaporation. Average long-term infiltration fluxes based on two years of monitoring are 5.8 x 10-9 cm/s, 6.0 x 10-8 cm/s and 5.6 x 10-8 for the large-ring, small-ring, and water-balance data, respectively. The saturated hydraulic conductivity of the liner based on small-ring data, estimated using Darcy's Law and the Green-Ampt Approximation, is 3 x 10-8 and 4 x 10-8 cm/s, respectively. All sets of data indicate that the liner's performance exceed that which is required by the U.S. EPA.

Additional Publication Details

Publication type:
Conference Paper
Publication Subtype:
Conference Paper
Title:
Construction and performance of a long-term earthen liner experiment
Issue:
26
Year Published:
1990
Language:
English
Publisher:
Publ by ASCE
Publisher location:
New York, NY, United States
First page:
135
Last page:
155
Number of Pages:
21
Conference Title:
Proceedings of a Symposium on Waste Containment Systems: Construction, Regulation, and Performance
Conference Location:
San Francisco, CA, USA
Conference Date:
6 November 1990 through 7 November 1990