A well with a diameter of 0.6 m is constructed in a confined aquifer as illustrated in F...

A well with a diameter of 0.6 m is constructed in a confined aquifer as illustrated in Figure 4-34. The sand aquifer has a uniform thickness of 15 m overlain by a surface clay layer with a depth of 35 m. A pumping test is conducted to determine the permeability of the aquifer. The initial piezometric surface was 15.0 m below the ground surface datum in the test well and observation wells. After pumping at a rate of 13.01/s for several days, water levels in the wells stabilized with the following drawdowns: 6.4 m in the test well, 3.7 m in the observation well, 10 m from the test well, and 2.4 m in the second test well at a distance of 30 m. Calculate the coefficient of permeability for the aquifer. Then, using this K value and an assumed distance of 200 m to the edge of the cone of depression, estimate the well discharge with the drawdown in the well lowered to the surface of the confined aquifer. (AnswerK = 0.12 mm/s,Q = 351/s)