Correct Answer - Option 5 : the same for all wells irrespective of their design
Concept:
The specific capacity of a well is the discharge per unit drawdown in the well. It measures the effectiveness or efficiency of a well.
Factors affecting the specific capacity of well are:
a) Diameter of well: On increasing the diameter of well, its specific capacity increases as yield of well increases.
b) Aquifer thickness: Higher thickness of aquifer, higher will be the specific capacity.
c) Duration of pumping and pumping rate: It decreases with the increase in pumping rate and its duration.