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

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

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.

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.

When two wells are discharged, their drawdown curves intersect within their radii of zero drawdown. Thus the total discharge is increased.

The coefficient of transmissibility T is equals the field of co-efficient of permeability K multiplied by the aquifer thickness b:

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

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

Specific yield is an indication of the water yielding capacity of an unconfined aquifer.

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.