ABSTRACT
This chapter deals with a few problems that have analytic or closed-form solutions. A confined aquifer is an aquifer in which the pressure head at its top boundary is positive such that the hydraulic head lies above the elevation head at the interface. Drawdown does not have to be a physical cone of depression that separates saturated from unsaturated zones. The unconfined aquifer is horizontal and of infinite lateral extent. Its hydraulic head stays constant during pumping. As the hydraulic head in the confined aquifer declines, water will flow from the water-table aquifer into the confined aquifer if the confining aquitard is somewhat permeable. The solutions for the Hantush leaky aquifer were obtained by lumping the leakage as volumetric water production, although the solutions are intended for leakage from an overlying unconfined aquifer through an intervening aquitard. The hydraulic conductivity in the confined aquifer is anisotropic.
