Channel with a system of rogue or flood wave generation

Numerous methods have been reported in literature, for the evaluation of the laboratory and field flow discharge in free surface canals: volumetric methods, spatial integration of velocity measured in many points of the water section, flow scale, measurements based on the law of Bernoulli, etc.
The increasing availability of calculation methods now allows us to obtain with greater accuracy the complex relationships that exist among hydraulic variables and parameters. In particular, the precision of the maximum discharge estimation would be much improved by the availability of two hydrometric stations that are able to measure continual hydraulic tailwater levels at such a
distance in order to appreciate the phase displacement of the flood wave peaks. In fact, it is easy to see, with reference to the extremely simplified case of a kinematic wave in a rectangular channel, that the celerity measurement allows an estimate not only of the discharge, but also of the roughness. In a nation research project we used an innovative computerized technique to measure the discharge in a channel in unsteady flow conditions.