An earth dam, as schematically shown to scale in Figure P7.9.3, is constructed with a uniform material having a coefficient of permeability of 2 .00 X I o-6 m/sec on a relatively impervious

foundation. The dam is 30 m high, which can be used as the drawing scale. Compute the seepage rate in units of cubic meters per day per unit width of the dam. Assume the phreatic surface emerges on the downstream slope at a distance of x = 30 m, as defined in Figure 7.29.

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18 m 30 m 25 m Figure P7.9.3