Clay Liner Breakthrough Time Calculator
This Leachate Clay Liner calculator is used to estimate the time to breakthrough for leachate to make good liners.
Landfill Clay Liner Breakthrough Time Formulas
Breakthrough time can be determined by the following equation:
t =
Where,
t is break through time in years.
d is thickness of clay liner in m.
K is coefficient of permeability m/year.
η is porosity in percentage.
h is hydraulic head in m.
The typical porosity values vary from 0.1 to 0.3 for the clays with permeability coefficient values from 10-6 to 10-8.
Clays with permeabilities less than 10-9 m/s are commonly considred adequate to provide long-term protection of the environment.
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