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In hydraulic engineering, a nappe is a sheet or curtain of water that flows over a weir or dam. The upper and lower water surface have well-defined characteristics that are created by the crest of a dam or weir. [1] Both structures have different features that characterize how a nappe might flow through or over impervious concrete structures. [2]
A polynomial weir is a weir that has a geometry defined by a polynomial equation of any order n. [11] In practice, most weirs are low-order polynomial weirs. The standard rectangular weir is, for example, a polynomial weir of order zero. The triangular (V-notch) and trapezoidal weirs are of order one. High-order polynomial weirs are providing ...
Weir on Lake Tecumseh, Virginia. A flow control structure is a device that alters the flow of water in a stream, drainage channel or pipe. As a group these are passive structures since they operate without intervention under different amounts of water flow and their impact changes based on the quantity of water available.
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.
Penton Hook Lock with City of London arms on the House. The green box is the hydraulic control system Goring Lock demonstrates the common juxtaposition of weir, lock island, lock keeper's house and lock Choice of Yellow and Red warning boards which are placed on lock gates when navigation is hazardous Kayaker at Boulter's Weir
A stepped spillway of the James Bay Project in Canada. A stepped spillway is a spillway with steps on the spillway chute to assist in the dissipation of the kinetic energy of the descending water.
h 1 is the height of the water above the top of the weir. [ 14 ] [ 15 ] [ further explanation needed ] He remained at the Locks and Canal Company for his entire career, until retirement in 1884 at the age of 69, and remained on as a consultant right up until his death.
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