0210

Note: For t' > 5, V(t',r') is about equal to 0.5W[(r')2/4t], which is the well function in Table 9.7.2.

Source: From N.S. Boulton, 1954, The drawdown of water table under non-steady conditions near a pumped well in an unconfined formation, Proc. Inst. Civ. Eng. (London) 3, Pt. 2:564-579.

Note: For t' > 5, V(t',r') is about equal to 0.5W[(r')2/4t], which is the well function in Table 9.7.2.

Source: From N.S. Boulton, 1954, The drawdown of water table under non-steady conditions near a pumped well in an unconfined formation, Proc. Inst. Civ. Eng. (London) 3, Pt. 2:564-579.

TABLE 9.7.5 CORRECTION FACTOR Ck r' 0.03 0.04 0.06 0.08 0.1 0.2 0.4 0.6 0.8 1 2 4 Ck -0.27 -0.24 -0.19 -0.16 -0.13 -0.05 0.02 0.05 0.05 0.05 0.03 0

where m is a function of t' and can be obtained from a curve plotted through the following points:

References

Boulton, N.S. 1954. The drawdown of water table under non-steady conditions near a pumped well in an unconfined formation. Proc. Inst. Civ. Eng. (London) 3, pt 2:564-579. Bouwer, H. 1978. Groundwater hydrology. McGraw-Hill, Inc. Strack, O.D.L. 1989. Groundwater mechanics. Vol. 3, pt. 3:564-579. Prentice-Hall, Inc.

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