14) A pumping test (see figure below) was performed in a well penetrating a confined aquifer to evaluate the coefficient of permeability of the soil in the aquifer. When equilibrium was reached, the following data were obtained: Discharge of water from the well, q = 750 litres/min Water level (h1) = 5 m, at radius (r1) = 20 m Water level (h2) = 6 m, at radius (r2) = 60 m Thickness of aquifer, D = 6 m Determine the permeability of the soil. Aquifer D (Permeable) Q r h Impervious Strata h Datum V Impervious Strata