where Q is the volumetric flow rate through the wall in cubic meters per second; A is the cross-sectional wall area in square meters; K is the hydraulic conductivity of the slurry wall in meters per second; and dh/dl is the hydraulic gradient between the inner and outer portions of the slurry wall in meters per minute.
Assuming a hydraulic gradient of 2 m/m and hydraulic conductivity of 10-7 cm/s yields a total leachate flow rate of 2.16 m3/day.