Hydropower Engineering past question

Find the specific discharge through homogeneous earthen embankment dam with 2 m thick central impervious core. Height of the dam = 50m; Upstream water level = 48.00m; Bed level = 470.00m; Width of the dam at the top = 10.00m; Upstream and downstream slope of the dam = 1:3 (V:H); Coefficient of permeability of the soil = 3 cm/hr; Coefficient of permeability of impervious core = 1.0×10⁻⁸ m/s. Also calculate co-ordinate of phreatic line. [8+2]