weir
weir / wi(ə)r/ • n. a low dam built across a river to raise the level of water upstream or regulate its flow. ∎ an enclosure of stakes set in a stream as a trap for fish.
weir
weir An engineered structure extending across an open water channel. It is possible to calculate the volume of water flowing over a weir from a knowledge of its particular characteristics. Weirs are designed for flow measurement in a variety of shapes but the most common are the suppressed, contracted, V-notch, trapezoid, and broadcrested types. Other weirs may be used to control river water levels or divert flow into channels.
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