PROBLEMS PROBLEMS 89 99 3.1. Determine the seepage rate under the dam shown in Fig. P3.1 using a flow net. Impermeable structure 71 4 m -10 m- 5 m 5 m Fig. P3.1 77 1 m k₁ =2x 10-6 m/s K2 1.6 x 10-6 m/s