In a subcritical flow in a channel ΔZ m is the maximum height of a smooth hump that can be installed to cause critical flow over the hump. If a hump of height ΔZ > ΔZ m is installed then
1
The flow over the hump will be super critical
2
The flow over the hump will be critical and the lowering of the upstream water
3
The flow over the hump will be sub critical
4
The flow over the hump will be critical and the up stream water surface will rise