These values, s, r2/t, u, and W(u) can then be used to calculate T and S from Equations 9.7(20) and 9.7(14).

The following example illustrates the Theis solution (H. Bouwer 1978). With the use of the drawdown data in Table 9.7.2, the data curve and type curve are overlapped to make the two curves match as shown in Figure 9.8.2. Four coordinates of the matching point are:

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