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  2. Weir - Wikipedia

    en.wikipedia.org/wiki/Weir

    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 ...

  3. Post pounder - Wikipedia

    en.wikipedia.org/wiki/Post_pounder

    A red-colored post pounder next to two green steel t-posts. A post pounder, post driver, post rammer, post knocker or fence driver is a tool used for driving fence posts and similar items into land surfaces. It consists of a heavy steel pipe which is closed at one end and has handles welded onto the sides. It is normally used by one person, but ...

  4. Notch (engineering) - Wikipedia

    en.wikipedia.org/wiki/Notch_(engineering)

    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.

  5. Notching - Wikipedia

    en.wikipedia.org/wiki/Notching

    Bicycle frame in steel tube, notched at the joints before TIG welding or brazing. Tube notching is commonly performed before joining light-gauge tubes to make a tee or similar joint, as by welding. Either one or both tubes may be notched before assembly. A familiar example of tube notching is in the manufacture of bicycle frames.

  6. Stoplogs - Wikipedia

    en.wikipedia.org/wiki/Stoplogs

    Typically small amounts of water will leak between individual logs. Stoplogs are typically used in structures where the removal, installation, and replacement of the logs is expected infrequently. When larger flows of water are passing through a stoplog gate, it can be difficult to remove or place individuals logs.

  7. Drop structure - Wikipedia

    en.wikipedia.org/wiki/Drop_structure

    A drop structure, also known as a grade control, sill, or weir, is a manmade structure, typically small and built on minor streams, or as part of a dam's spillway, to pass water to a lower elevation while controlling the energy and velocity of the water as it passes over.

  8. Welded wire mesh fence - Wikipedia

    en.wikipedia.org/wiki/Welded_wire_mesh_fence

    Welded wire mesh fence is a steel fence consisting of wire strands electrically welded together to form a high strength mesh. The fencing is available in two formats: rolled mesh and rigid mesh. The fencing is available in two formats: rolled mesh and rigid mesh.

  9. Flume - Wikipedia

    en.wikipedia.org/wiki/Flume

    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 ...

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