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Aquifer of infinite extent and thickness

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Aquifer of infinite extent and thickness

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.