Unsteady flow to a pumped well in a two-layered water-bearing formation

New equations are derived for the drawdown in an aquifer, consisting of two horizontal layers, referred to as the block and the fissure, which have different hydraulic properties. The block and the fissure are compressible. Account is taken of both the horizontal and vertical flow components in the block and the fissure. The depth of the fissure is assumed to be small compared with that of the block. The abstraction well, which is pumped at a constant rate, has a vanishingly small radius. Type curves for drawdowns in the fissure and the block are computed and plotted for some values of the aquifer constants involved.