"reprint from Journal of the Irrigation and Drainage Division, vol.108 no.IR2, June 1982" - title page.
|Statement||[by] W. Boiten and R.H. Pitlo.|
|Series||Publication / Delft Hydraulics Laboratory -- no.281|
|Contributions||Pitlo, R. H., Delft Hydraulics Laboratory., American Societyof Civil Engineers.|
Broad-crested. A broad-crested weir is a flat-crested structure, where the water passes over a crest that covers much or all of the channel width. This is one of the most common types of weir found worldwide. Compound. A compound weir is any weir that comprises several different designs into one structure. Discussion of “Broad-Crested Weir” by Willi H. Hager and Markus Schwalt Journal of Irrigation and Drainage Engineering March Discussion of “V‐Shaped Short‐Crested Weir With Semicircular Cross Section” by Wubbo Boiten (December, , Vol. , No. 4). Weirs not sharp crested are classified according to the shape of their cross section, such as broad-crested weirs, triangular weirs, and trapezoidal weirs. The channel leading up to a weir is the channel of approach. The mean velocity in this channel is the velocity of approach. The depth of water producing the discharge is the head. Sharp. The authors are gratefully appreciated for presenting an experimental study (Ramamurthy et al. ) on determining the discharge coefficients (C d) of V-shaped multislit authors’ present study (Ramamurthy et al. ) is mainly focused on the determination of a single relation between the weir discharge coefficient and the weir Reynolds number for both the rectangular .
Weirs are structures consisting of an obstruction such as a dam or bulkhead placed across the open channel with a specially shaped opening or notch. The flow rate over a weir is a function of the head on the weir. Common weir constructions are the rectangular weir, the triangular or v-notch weir, and the broad-crested weir. Discharge Relations for Rectangular Broad-Crested Weirs Article (PDF Available) in Tarim Bilimleri Dergisi 17(4) January with 1, Reads How we measure 'reads'. ČSN ISO (25 ), Liquid flow measurement in open channels. Round-nose horizontal broad-crested weirs. ČSN ISO (25 ), Measurement of liquid flow in open channels by weirs and flumes - V-shaped broad-crested weirs. EL-ALFY K. S., Effect of Vertical Curvature of Flow at Weir Crest. Experiments on Discharge Equations of Compound Broad-Crested Weirs Article in Journal of Irrigation and Drainage Engineering (4) August with Reads How we .
The v notch weir is widely used to measure open channel flow rate. It is especially good for measuring a low flow rate, because the area of flow through the v notch becomes quite small while the head over the v notch is still a measurable value. When a v notch weir is used to meter flow, the weir equation Q = H^ can be used to calculate Q, the flow rate over the weir . Weirs are the controls or barriers placed in an open channel to permit measurement of water discharge (Encyclopedia Britannica ). They are the type of dams that are. Broad-crested weirs have a horizontal crest with a finite length, L b, in the flow direction, as shown in Figure A weir is classified as broad-crested if > (L b /h 0) > (Sturm, ). Streamlines become straight and parallel over a broad-crested weir, with the critical depth occurring at some point over the crest. Even when working in metric units, when we hover the mouse over Weir Coefficient in the Deck/Roadway Data Editor or Inline Structure Weir Station Elevation Editor, the pop hint still shows the weir coefficient range for broad crested weir as and Ogee