In channel transition with a width contraction
1
Depth y2 decreases on decreasing width up to limiting value B2m if the flow is subcritical.
2
Depth y2 increases on decreasing width up to limiting value B2m if the flow is subcritical.
3
Depth y1 decreases on decreasing width beyond B2m if the flow is subcritical.
4
Depth y2 decreases on decreasing width up to limiting value B2m if the flow is supercritical.