In order to verify the equation derived here, an experiment was preformed in a water tunnel of 6" width over a wide variety of depths. The volume flow rate, the height of the barrier, and the initial height of the flow were all known
The variables are defined as follows:
Q - volumetric flow rate of the water tunnel
H0 - height of barrier
H - height of the raised water level due to the barrier
Below are photos of the experiment being conducted in the water tunnel
Q = 196.7in3/s D = 4.5” H0 = 2.625” W0 = 6” H = 4.75” Ha = 3”
The table below tabulates the results and provides a calculation of the percent error between the H measured experimentally to the H calculated by solving the equation derived on this page.
The errors on the height terms is relatively small, so the equation used to calculate the change in height was verified in this experiment.