5.2.4. Well efficiency characterization
The average efficiencies have been found in the Well No. 4 is 95.26% and in the Well No. 2 it is 93.25%. The higher efficiency of the well reduces the costs of pumping. According to Kresic (2006), the values of > 70% have been accepted for the good production of water. This rate of efficiency indicates the proper designed and developed wells. The development factor of Well No. 4 is 0.0005 and Well No. 4 is 0.00725. On the basis of Bierschenk’s classification (Bierschenk, 1963), the factor values of these wells are <0.1 which indicated that the studied wells are “very effective”.