flume

I’ll mark the water level in the flume first using this straight weir.

To show how this works, I’ve built this flume and some model weirs.

My flume isn’t long enough to simulate a boat moving through a canal, but if you switch your frame of reference to that of a ship, it can simulate the movement of water passing by.

When this supercritical flow transitions back to subcritical flow in the slower moving water downstream, it creates a hydraulic jump as you can see here in my model flume.