The flowrate, Q, in an open canal or channel can be measured by placing a plate with a V...

The flowrate, Q, in an open canal or channel can be measured by placing a plate with a Vnotch across the channel as illustrated in Fig. P7.4R. This type of device is called a V-notch weir. The height, H, of the liquid above the crest can be used to determine Q. Assume that

where g is the acceleration of gravity. What are the significant dimensionless parameters for this problem?