This calculator estimates the leakage through geomembranes and composite liners with and without geomembrane defects/holes. The calculator illustrates the importance of intimate contact between the geomembrane and compacted subgrade or soil liner via different levels of contact.  The effect of wrinkles on leakage rates is also quantified using a database of wrinkle dimensions for a number of common geomembranes, which shows the presence of wrinkles can significantly increase leakage rates.

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