The duty of water is 1420 ha/cumec for a crop whose base period is 60 days. Calculate the delta (Δ) for the crop.

The depth of flow in an irrigation channel is 2.5 m and the value of critical velocity ratio (m) is 1.2. What is the expression for critical velocity v0 (m/s) according to Kennedy's theory?

Compute the total depth of water (delta) required for a wheat crop if the duty at the field is 700 ha/cumec and the base period is 360 days.