Hydropower Engineering past question

Design an orifice type intake for a ROR plant having design discharge of 5 m³/s. The difference of elevations between the weir crest level and the river bed level is 2.5 m. The difference of elevations between the weir crest level and the designed canal water surface level is 0.3 m. The intake velocity is limited to 0.8 m/s. Take coefficient of discharge as 0.6, coefficient of contraction as 0.03, and coefficient of trash rack bar as 1.83. [7]