Iterative Method of Determining Aquifer Constants

by Mohammad Akram Gill, (M.ASCE), Sr. Lect.; Dept. of Civ. Engrg., Ahmadu Bello Univ., Zaria, Nigeria,

Serial Information: Journal of the Irrigation and Drainage Division, 1975, Vol. 101, Issue 1, Pg. 81-85

Document Type: Journal Paper


In the proposed method, it is possible to consider as many terms in the series of Eq. 3 as may be significant for calculating the aquifer constants. Therefore, the method can be considered as a refinement or extension of Jacob's method in which only the first two terms of the series are considered. It can be compared with the Theis method in which the match of the drawdown curve with the type curve is obtained graphically. In the proposed method, the match is obtained algebraically. The aquifer constants determined by the proposed method satisfy Eq.3 for the two selected values of s and r²/t. Therefore, the type curve is made to pass through the selected points, u1 and u2. Because these two points are selected from a smooth curve passing through the test data, the fit generally is good at all the other points also.

Subject Headings: Curvature | Aquifers | Drawdown (hydrology) | Graphic methods | Pumping tests | Hydrologic data

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