long throated flume

Open-channel flow measuring devices of various cross-sections, having three to five main sections. Their operation is based on critical flow occurring in a contracted throat, with parallel walls and level floor that is long enough to produce nearly parallel flow streamlines. This allows accurate calibration by computational methods. The name usually refers to devices with contractions from the channel sides or from both the sides and bottom. Flumes with bottom-only contractions are traditionally referred to as a type of broad-crested weir, but are hydraulically the same as long-throated flumes. Also called Replogle flume or ramp flume.

Authorization Path: 2.4.5.2.20.15