A "rapidly varied flow" in an open channel is characterized by i.e. the flow depth changes occur over a relatively short distance. One such example of a rapidly varied flow is "hydraulic jump" in which flow changes from a relatively shallow, high-speed condition into a relatively deep, low-speed condition within a horizontal distance of just a few channel depths. The mathematical analysis of "hydraulic jump" will be discussed in the subsequent lectures. Many open channel flow-measuring devices are based on the principle associated with rapidly varied flows. These devices include broad-crested weirs, sharp-crested weirs and sluice gate.
i.e. the flow depth changes occur over a relatively short distance. One such example of a rapidly varied flow is "hydraulic jump" in which flow changes from a relatively shallow, high-speed condition into a relatively deep, low-speed condition within a horizontal distance of just a few channel depths. The mathematical analysis of "hydraulic jump" will be discussed in the subsequent lectures. Many open channel flow-measuring devices are based on the principle associated with rapidly varied flows. These devices include broad-crested weirs, sharp-crested weirs and sluice gate.