## R

ln and the drawdown s at any point is given by s - to - t —

Radial Flow in a Semiconfined Aquifer

Radial flow in a semiconfined aquifer occurs when the flow is towards a well in an aquifer such as the one shown in Figure 9.3.4.

When leakage through the confining layer is considered, Equation 9.3(4) becomes

9r2 r

The general solution of this equation is

where A and B are arbitrary constants, and Io and Ko are modified Bessel functions of zero order and of the first and second kind, respectively. Table 9.3.1 is a short table of the four types of Bessel functions. The two constants are

## Post a comment