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Aquifer of infinite extent and thickness
Assumptions:
✓aquifer is confined, anisotropic on the vertical plane, of infinite extent and thickness;
✓drawdown can be estimated in an observation well or in a piezometer at any distance from the pumping well.
a
b c
Linear source in a confined aquifer of infinite extent and thickness.
a – 3D view; b – cross-section showing observation well; c – cross-section showing piezometer.
Fundamental equations:
Average drawdown in an observation well:
Drawdown in a piezometer:
Pumping regimes:
One well pumped at a constant rate
Pumping
Recovery
One or several wells pumped at a variable rate
Pumping
References
Бабушкин В.Д. Определение водопроницаемости анизотропных пород методом опытных откачек // Разведка и охрана недр. 1954. № 6. С. 50–53.
Гиринский Н.К. Определение коэффициента фильтрации по данным откачек при неустановившихся дебите и понижениях. М.: Госгеолиздат, 1950.
Мироненко В.А., Шестаков В.М. Теория и методы интерпретации опытно-фильтрационных работ. М.: Недра, 1978.
Hantush M.S. Aquifer tests on partially penetrating wells // Journal of the Hydraulics Division. Proceedings of the American Society of Civil Engineers. 1961. Vol. 87, N HY5, P. 171–195.
Hantush M.S. Drawdown around a partially penetrating well // Journal of the Hydraulics Division. Proceedings of the American Society of Civil Engineers. 1961. Vol. 87, N HY4. P. 83–98.