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A notch weir is any weir where the physical barrier is significantly higher than the water level except for a specific notch (often V-shaped) cut into the panel. At times of normal flow all the water must pass through the notch, simplifying flow volume calculations, and at times of flood the water level can rise and submerge the weir without ...
Charpy test sample with a notch. In mechanical engineering and materials science, a notch refers to a V-shaped, U-shaped, or semi-circular defect deliberately introduced into a planar material. In structural components, a notch causes a stress concentration which can result in the initiation and growth of fatigue cracks.
Barbed wire fences remain the standard fencing technology for enclosing cattle in most regions of the United States, but not all countries. The wire is aligned under tension between heavy, braced, fence posts (strainer posts) and then held at the correct height by being attached to wooden or steel fence posts, and/or with battens in between.
A free nappe, which is ventilated to maintain atmospheric pressure below, does not come into contact with the underside of the weir. [7] A depressed nappe is partially ventilated, which creates negative pressure beneath the nappe. The negative pressure leads to a 6% to 7% increase in discharged water compared to a free nappe. [8]
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Stoplogs are designed to cut off or stop flow through a conduit. They are typically long rectangular timber beams or boards that are placed on top of each other and dropped into premade slots inside a weir, gate, or channel. Present day, the process of adding and removing stoplogs is not manual, but done with hydraulic stoplog lifters and ...
A South Dakota man is facing murder and manslaughter charges after police say he killed a woman and decapitated her. According to court documents obtained by PEOPLE, Craig Allen Nichols Jr., 32 ...
As trade rumors circulate about whether or not the Miami Heat could trade Jimmy Butler, Tom Haberstroh and Dan Devine reveal this week’s The Big Number to explain why now is the perfect time for ...