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<br />'to <br /> <br />The relations between the pumping of a well and the resulting <br /> <br />depletion of a nearby stream have been derived by several investigators <br /> <br />(Theis, 1941; Conover, 1954; Glover and Balmer, 1954; Glover, 1960; <br />Theis and Conover, 1963; and Hantush, 1964, 1965). The results <br /> <br />generally are shown in the form of equations and charts. Except for <br /> <br />the charts shown by Glover (1960) in a publication that had limited <br />distribution, the charts are useful as computational tools only in the <br /> <br />range of comparatively large effects, leaving the user with rather <br /> <br />formidable equations to solve in evaluating small effects. The <br /> <br />average user retreats in dismay when faced by the mysticism of "line <br /> <br />source integra 1," "com? lementaxy error func t ion, II or "the second <br /> <br />repeated integral of the error function." Because this writer <br /> <br />definitely is a member of the community of "average users," he has <br /> <br />exercised what he believes to be his prerogative of reversing the <br /> <br />usual order of presentation. In this paper, the working tools-- <br /> <br />curves, tables, and sample computations--are, shown first, and the <br /> <br />discussion of their mathematical bases is relegated to an appendix. <br /> <br />The usefulness of the tools will not be greatly enhanced by an under- <br /> <br />standing of the material in the appendix; it is shown for the benefit <br /> <br />of those who desire to examine the mathematical bases of the tools. <br /> <br />1.< <br /> <br />. <br /> <br />.' <br /> <br />'I <br />I <br /> <br />1.10< <br /> <br />3 <br /> <br /> <br />