critical flow
critical flow Critical flow occurs when the flow velocity in a channel equals the wave velocity generated by a disturbance or obstruction. In this condition the Froude number (Fr) = 1. When the wave velocity exceeds the flow velocity (Fr is less than 1) waves can flow upstream, water can pond behind an obstruction, and the flow is said to be subcritical or tranquil. When Fr is greater than 1 waves cannot be generated upstream and the flow is said to be supercritical, rapid, or shooting. In this condition a standing wave is formed over obstructions in the river bed. In nature, supercritical flow is found only in rapids and waterfalls, but it is often created artificially by weirs and flumes with the aim of measuring discharge.
critical flow
critical flow The flow that occurs when the flow velocity in a river channel equals the wave velocity generated by a disturbance or obstruction. In this condition the Froude number (Fr) = 1. When the wave velocity exceeds the flow velocity (i.e. Fr is less than 1) waves can flow upstream, water can pond behind an obstruction, and the flow is said to be subcritical or tranquil. When Fr is greater than 1 waves cannot be generated upstream and the flow is said to be supercritical, rapid, or shooting. In this condition a standing wave is formed over obstructions in the river bed. In nature, supercritical flow is found only in rapids and waterfalls, but it is often created artificially by weirs and flumes, with the aim of measuring discharge.
More From encyclopedia.com
Hypopycnal Flow , hypopycnal flow Bankfull Flow , bankfull flow Debris Flow , Debris flow
Debris flow is a process in which water-saturated masses of material ranging from sand grains to boulders move across low slopes. These f… Flow , Flow
BIBLIOGRAPHY
Embedded within and critical to the burgeoning field of positive psychology, the concept of flow represents an optimal state of con… Baseflow , baseflow(dry-weather flow) In a stream or river, the flow of water derived from the seepage of groundwater, and/or through-flow into the surface wate… uniform flow , uniform flow
1. In channels, a flow whose velocity and discharge do not vary along the channel's length.
2. In groundwater, a flow whose velocity and…
About this article
critical flow
All Sources -
You Might Also Like
NEARBY TERMS
critical flow