Hydraulics of Embankment Weirs
- 1 September 1998
- journal article
- Published by American Society of Civil Engineers (ASCE) in Journal of Hydraulic Engineering
- Vol. 124 (9), 963-971
- https://doi.org/10.1061/(asce)0733-9429(1998)124:9(963)
Abstract
Embankment weirs, often found in engineering applications with a side slope 1V:2H, are considered in this paper. For free overflow, the discharge coefficient is determined in terms of relative crest length for long broad-crested, broad-crested, short-crested, and thin-crested weirs. A considerable increase of capacity is noted when compared to broad-crested weirs with vertical faces. For submerged overflow, four regimes are identified: (1) A-jump; (2) plunging jet; (3) surface wave; and (4) surface jet. Particular attention is focused on plunging jets and surface waves. The flow regimes are discussed in terms of submergence, crest length, and modular limit. A description is given of the forward and backward (recirculation) zones with indications of typical lengths. Also, the entire velocity field is described, including the maximum forward and backward velocities, and the velocity distribution in arbitrary sections of the tailwater region. It is found that plunging jets and surface jets are hydraulically ...Keywords
This publication has 7 references indexed in Scilit:
- Submerged Flow Regimes of Rectangular Sharp-Crested WeirsJournal of Hydraulic Engineering, 1996
- Broad‐Crested WeirJournal of Irrigation and Drainage Engineering, 1994
- Energy Dissipators and Hydraulic JumpWater Science and Technology Library, 1992
- Drownproofing of Low Overflow StructuresJournal of Hydraulic Engineering, 1991
- Theory of WeirsPublished by Elsevier ,1975
- Flow Below Deeply Submerged Rectangular WeirsJournal of Hydraulic Research, 1969
- The Hydraulic Jump as a Well JetJournal of the Hydraulics Division, 1965