Impermeable

FIG. 9.8.12 Slug test setup. (Reprinted from H. Bouwer, 1978, Groundwater hydrology, McGraw-Hill, Inc.)

Le = height of the perforated, screened, uncased, or otherwise open section of the well through which groundwater enters yo = y at time zero yt = y at time t t = time sine yo

In Equation 9.8(58), y and t are the only variables. Thus, if a number of y and t measurements are taken, they can be plotted on semilog paper to give a straight line. The slope of the best-fitting straight line provides a value for ^h(yo/yt)/t. All other parameters in Equation 9.8(58) are known from well geometry, and K can be calculated.

DIY Battery Repair

DIY Battery Repair

You can now recondition your old batteries at home and bring them back to 100 percent of their working condition. This guide will enable you to revive All NiCd batteries regardless of brand and battery volt. It will give you the required information on how to re-energize and revive your NiCd batteries through the RVD process, charging method and charging guidelines.

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