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Observational wells were drilled in a cone of depression of artesian (confined) well. The drawdown in...

Observational wells were drilled in a cone of depression of artesian (confined) well. The drawdown in the observational wells at 9 m and 18 m from the center of the well were found to be 12 m and 10 m, respectively. If the hydraulic conductivity of the aquifer is 2.5 mm/min and the pumping flow rate from the well is 407 m3/hr   

(i) Determine the thickness of the aquifer.

(ii) Find diameter of the well if the drawdown at the walls of the well is 19 m.

(iii) Find the distance from the well where the draw down equals to 0.5 m.

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