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The broad crested weir at the Thorp grist mill in Thorp, Washington, US. Commonly, weirs are used to prevent flooding, measure water discharge, and help render rivers more navigable by boat. In some locations, the terms dam and weir are synonymous, but normally there is a clear distinction made between the structures. Usually, a dam is designed ...
Some varieties of flumes are used in measuring water flow of a larger channel. When used to measure the flow of water in open channels, a flume is defined as a specially shaped, fixed hydraulic structure that under free-flow conditions forces flow to accelerate in such a manner that the flow rate through the flume can be characterized by a level-to-flow relationship as applied to a single head ...
An illustration exists of a unitless E – Y diagram and how Energy and depth of flow change throughout a Parshall Flume. The two blue lines represent the q values, q 1 for the flow before the constriction, and q 2 representing the value at the constriction (q = Q/b = ft 2 /s, or flow over width in a
This page was last edited on 28 December 2020, at 13:06 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
Eskers may be broad-crested or sharp-crested with steep sides. [5] They can reach hundreds of kilometers in length and are generally 20–30 m (66–98 ft) in height. The path of an esker is governed by its water pressure in relation to the overlying ice.
Hydraulic jump in a rectangular channel, also known as classical jump, is a natural phenomenon that occurs whenever flow changes from supercritical to subcritical flow. In this transition, the water surface rises abruptly, surface rollers are formed, intense mixing occurs, air is entrained, and often a large amount of energy is dissipated.
This page was last edited on 16 October 2022, at 04:55 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
The tilting weir has its origins in the 19th century drum weir which functions using the same principles as the 20th century design. The drum weir, was for a long time confined to the River Marne, where it was first introduced in 1857. [5] Early tilting weirs were constructed from wrought iron and wood.