Estimation of maximum liquid head over landfill barriers

Xuede Qian; Donald H. Gray; Robert M. Koerner

doi:10.1061/(ASCE)1090-0241(2004)130:5(488)

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Estimation of maximum liquid head over landfill barriers

Journal article

Peer reviewed

Estimation of maximum liquid head over landfill barriers

Xuede Qian, Donald H. Gray and Robert M. Koerner

Journal of geotechnical and geoenvironmental engineering, v 130(5), pp 488-497

May 2004

DOI: https://doi.org/10.1061/(ASCE)1090-0241(2004)130:5(488)

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Abstract

design

disposal barriers

drainage

Engineering geology

hydraulic conductivity

hydraulic head

landfills

leachate

pipelines

seepage

slopes

waste disposal

To properly design a drainage layer for either landfill leachate collection systems or final covers, the designer must be able to estimate the maximum liquid head over the barrier for any proposed configuration. This paper presents four explicit formulas for estimating the maximum liquid head over an impervious sloping barrier. By means of numeric comparisons, McEnroe's 1993 method is recommended for design of drainage layers for both bottom liners and final covers. Pipe slope is an important parameter that influences the maximum leachate head on the liner. Different combinations of base grade and pipe slope can directly affect the actual drainage behavior. If the pipe slope is steeper than the base grade, it will make a longer drainage distance and cause a high leachate head on the liner. A method for calculating the maximum liquid head in multilayered drainage media (e.g., geosynthetic and soil) is presented in the paper. The key consideration for this case is to determine the equivalent hydraulic conductivity of the combined drainage media under the phreatic surface under unconfined seepage conditions.

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17 citations in Web of Science

25 citations in Scopus

Details

Title: Estimation of maximum liquid head over landfill barriers
Creators: Xuede Qian - Michigan Department of Environment, Great Lakes, and Energy
Donald H. Gray - University of Michigan–Ann Arbor
Robert M. Koerner - Drexel University
Publication Details: Journal of geotechnical and geoenvironmental engineering, v 130(5), pp 488-497
Publisher: American Society of Civil Engineers
Resource Type: Journal article
Language: English
Academic Unit: [Retired Faculty]
Web of Science ID: WOS:000220960900005
Scopus ID: 2-s2.0-2342535764
Other Identifier: 991019167729904721