A hydraulic sand fill is tested using a falling head per-mea-meter that has a tube diameter of 1.27 cm (0.50 in.), sample diameter of 10.2 cm (4.0 in.), sample length of 20.4 cm (8.0 in.), and a starting head of 91 cm (35.8) in. The data collected are heads vs times and are given in Table 7.6.

Is this fill likely to be satisfactory? Justify youranswer.

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Table 7.6 Data Head (in.) 35.8 29.9 16.2 91.0 76.0 41.1 135 7.3 4.9 12.4 18.5 225 10.8 27.4 (cm) Time (s) 45 90 180