Which of the following options is correct with respect to the statements regarding Kennedy's and Lacey's theories? Statement 1: Kennedy's theory is based on the concept of critical velocity. Statement 2: Lacey's theory assumes that a stable channel is formed naturally by the flow.

The following statements relate to a contour canal: i) A contour canal does not follow the exact same contour line throughout. ii) It irrigates land on both sides. iii) It irrigates the area only on one side, as the other side is at a higher elevation. iv) It is aligned perpendicular to the contours. Which of the above statements is/are correct?

In the design of a straight glacis fall, the minimum clear length of the crest for a drop greater than 3 m is expressed as which percentage of the channel bed width?