4.2. Evaluation of pumping unit characterization
4.2.1 . Step-drawdown test
Jacob (1947) has formulated the step-drawdown test and Rorabaugh (1953) has modified it. These studies have been assumed as a homogenous and confined aquifer. It is anisotropic with the infinite areal extent and the pumping well which has fully penetrated the aquifer. The thickness of the aquifer, static water table aquifers with small drawdown and its solution has presented by Jacob (1947) and Rorabaugh (1953). The total process has been accepted by F. J. P. b. J. S. Driscoll, St Paul, Minnesota (1986). The whole methodology of pumping test and its analysis procedure has developed by Kresic (2006). After well construction, the step-drawdown tests have conducted immediately. To identify the well efficiency and aquifer transmissivity, the coefficients of B and C have been required to determine. On the basis of graphical method of Rorabaugh (1953) the step-test data have been evaluated. Actually, it is the straight-line method of adaptation of Jacob (1947). The total depths of Well No. 2 and Well No. 4 have 235m and 244m, respectively. Each well-pumping test has been included in 4 steps. The satellite maps have made also depend on other geologic and hydrogeological data.