Which of the following statements is/are INCORRECT about the most efficient triangular section open channel?
i. Top width of flow of water is twice of the depth of water.
ii. Sides of a channel make 45° with the vertical.
iii. Hydraulic depth is 75% of the depth of water.
1
i and ii both are incorrect
2
iii is incorrect
3
i is incorrect
4
ii is incorrect