# Clay Liner Breakthrough Time for Leachate Calculator

D - Thickness of clay (m)
K - Coefficient of permeability (m/year)
η - Porosity (%)
H - Hydraulic head (m)
T  =  19.5312
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Clay liner breakthrough time for leachate calculator - formula & step by step calculation to measure the amount of breakthrough time for leachate to penetrate a clay liner. t = [(d2η) / K(d + h)]. Thickness of clay liner d in m, coefficient of permeability K in m/year, porosity η in percentage & hydraulic head h in m are the key elements of this calculation. The typical porosity values vary from 0.1 to 0.3 for the clays with permeability coefficient values from 10-6 to 10-8.

Formula for Clay Liner Breakthrough Time
In environmental engineering, the below formula is used to calculate the breakthrough time for leachate to penetrate a clay liner. The step by step calculation for each set of inputs let the users to understand how to perform such landfill clay liner penetration time calculations manually. In the field of environmental engineering, while working with hazardous waste management, sometimes it's important to analyse the breakthrough time for leachate. The above formula & step by step calculation may useful for users to understand how the values are being used in the formula, however, when it comes to online for quick calculations, this landfill clay liner penetration time calculator helps the user to perform & verify such calculations as quick & easy as possible.