Short Sewer Sideweir
Publication: Journal of Irrigation and Drainage Engineering
Volume 123, Issue 5
Abstract
Sideweirs for combined sewers in converging U-shaped channels are analyzed. The results are applicable for storm sewers. Based on extended model observations and a hydraulic approach, the characteristics of sideweir flow are determined. These include the surface profile, the discharge distribution, the end depth ratio, and the energy losses due to lateral outflow. All results are presented in terms of approach conditions, and it is demonstrated that the approach Froude number is the significant flow parameter. For sideweirs with a relatively small weir height, the flow may become unstable and set up a surging phenomenon in the approach pipe. After careful experimentation, the instability was effectively removed with a so-called end plate. This device is positioned at the end wall of the sideweir and is able to stabilize the vorticity interface between the bottom and the surface vortices. The end plate can simply be added to existing designs.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Ackers, P. (1967). “The hydraulics of storm overflows.”Surface water and storm sewage, John Pickford, ed., Loughborough University, Loughborough, U.K., 27–44.
2.
Ackers, P., Brewer, A. J., Birkbeck, A. E., and Gameson, A. L. H. (1967). “Storm overflow performance studies using crude sewage.”Storm sewage overflows, Institution of Civil Engineers, London, U.K., 63–77.
3.
Chow, V. T. (1959). Open channel hydraulics. McGraw-Hill, Inc., New York, N.Y.
4.
Hager, W. H.(1994). “Supercritical flow in circular-shaped sideweir.”J. Irrig. and Drain. Engrg., ASCE, 120(1), 1–12.
5.
Hager, W. H., and Volkart, P. U. (1986). “Distribution channels.”J. Hydr. Engrg., ASCE, 112(10), 935–952; Errata 114(2), 235.
6.
Hamam, M. A., and McCorquodale, J. A.(1982). “Transient conditions in the transition from gravity to surcharged sewer flow.”Can. J. Civ. Engrg., 9(2), 189–196.
7.
Hörler, A., and Hörler, E. (1973). “Streichwehre mit niedrigen Überlaufschwellen in kreisförmigen Kanälen.”Gwf-wasser/abwasser, 114(12), 579–584 (in German).
8.
Oakley, H. R. (1967). “Practical design of storm sewage overflows.”Storm sewage overflows, Institution of Civil Engineers, London, U.K., 115–122.
9.
Tootill, P. R.(1977). “Storm sewage overflows, a survey of recent developments.”Chartered Municipal Engr., 104(10), 181–186.
10.
Yen, B. C.(1973). “Open channel flow equations revisited.”J. Engrg. Mech. Div., ASCE, 99(5), 979–1008.
Information & Authors
Information
Published In
Copyright
Copyright © 1997 American Society of Civil Engineers.
History
Published online: Sep 19, 1997
Published in print: Sep 19, 1997
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.