In a rectangular duct with a width of 5 m, the flow velocity is 2 m/s, while the base is 0.40 m. When a high threshold is set, the speed increases to 3m/s. that there is no regime change and that the channel acknowledging that its width has not changed;In a rectangular duct with a width of 5 m, the flow velocity is 2 m/s, while the base is 0.40 m. When a high threshold is set, the speed increases to 3m/s. that there is no regime change and that the channel acknowledging that its width has not changed; a) Calculate the water height before and above the threshold. b) Determine the regime of the current and the amount of flow passing through the section a) Calculate the water height before and above the threshold. b) Determine the regime of the current and the amount of flow passing through the section