6.2. A single V-shaped sharp crested weir

In the studies on a single V-shaped sharp crested weir, the opening angle was 90°. When plotting all the dimensionless velocity profiles into the same graph, it can be seen that the trend is the same with all the curves: velocities are highest near the bottom of the opening for all the discharges and heads (Fig. 25). With even high submergence, the velocity distribution remains the same.

It can be seen from the plot that with free nappe the dimensionless velocities near the bottom are remarkably higher than the velocities near the surface. With higher submergence, velocity distribution from the bottom to the surface is more even. However, always in the case of a single weir velocities near the bottom are always higher than near the surface. It can be concluded from the plot that velocities at the sides are lower than at the mid-axis because velocities at the mid-axis are much higher than the mean velocity of the cross-section.