Leaky aquifer with alternating water level in the adjacent aquifer
Assumptions:
✓leaky aquifer system: aquifer system consisting of three layers – two isotropic aquifers separated by aquitard;
✓the main aquifer (1) is penetrated by the pumping well;
✓the adjacent aquifer (2) is not penetrated by the pumping well;
✓initial water levels in aquifers may be different or coincide;
✓boundary: aquifer has infinite areal extent;
✓pumping well is fully penetrating, located in one of the aquifers, its storage capacity is neglected;
✓drawdown in aquifers can be estimated at any distance of the pumping well;
✓crossflow through the aquitard is vertical;
✓storage of the aquitards is neglected.
a 
b 
Cross-section of the leaky aquifer system with main pumped aquifer and water level in adjacent aquifer alternating during the test period; a – the main aquifer occurs in the bottom of aquifer system; b – the main aquifer occurs in the top of aquifer system.
Pumping regimes:
One well pumped at a constant rate
Pumping
Recovery
One or several wells pumped at a variable rate
Pumping
References
Hantush M.S. Flow to wells in aquifers separated by a semipervious layer // Journal of Geophysical Research. 1967. Vol. 72, N 6. P. 1709–1720.