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Earth dam h 5.6m 0.8 m 0.8 m 0.8 m 0.8 m 0.8 m 08 m Reservoir_ Phreatic surface (u 0) Impermeable foundation Gravel toe drain (flooded) Figure 1 Question 1 What is the estimated seepage through the earth dam per m run: (a) 96 x 10-5 m3/hour (b) 1.92 x 10-5 m3/hour (c) 6.91 x 10-2 m3/hour (d) 115.2 x 10-5 m3/hour er m run)- Question 2 The total head at point A shown in Figurel is (a) 3.2 m (b) 1.6 m (c) 2.4 m (d) 4.0 m Estimate the pore water pressure at Point A in Figure 1. (a) 15.7 kPa (b) 7.85 kPa (c) 23.6 kPa (d) 9.42 kPa lu 7. Question 4 Which of the following statement is true for the phreatic surface in Figure 1 (a) It is a flowline and a line of constant pressure (b) It is a flowline and an equipotential line (c) It is a flowline (d) s an equipotential line The earth dam shown in Figure 1 has a vertical permeability kv 1 x 10-5 m/s and horizontal permeability kh 1.44 x 10-5 m/s. The transformed flow net is drawn in Figure 1. Earth dam h#5.6 m 0.8 m 0.8 m 0.8 m 0.8 m 0.8 m 0.8 m Reservoir Phreatic surface (u 0) rm Gravel toe drain (flooded) Figure 1

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