Based on the assumption proposed by Dupuit’s theory, the velocity of flow is proportional to the tangent of the hydraulic agent instead of its sine.

Pumping-out test is the frequently used field method, as it involves discharging water from the ground.

K/A is known as the specific yield or specific capacity of an open well, in cubic meter per hour per square meter of the area through which water percolates.

Since the flow of water is not horizontal near wall and the flow no longer remains laminar. Thus, Darcy’s law equation is not valid near the well face.

Volume of water entering the well, when the head recuperates by dh is given by the equation: dV=Adh

The discharge of spherical flow qs is given by, qs/q =2.3(r/b) log10 1000

In the recuperation test, water level can be depressed to any level and the discharge from the well can be calculated.

The parabolic depression formed when water is pumped from the aquifer through well can be called as cone of depression or the drawdown surface.

A partially penetrating artesian well is the one in which the well screen does not penetrate to the full depth of the confined aquifer. Such wells extend only partly through the water bearing stratum.

For fine-grained type of soil, the value of K/A is 0.25 cubic meter per hour, per sq. m of the area under 1m depression head.