Safety Grates in Supercritical Channels
Publication: Journal of Irrigation and Drainage Engineering
Volume 120, Issue 1
Abstract
In areas of steep terrain, concrete lined channels designed for supercritical flow are often used to convey stormwaters. During dry conditions, concrete channels attract playing animals, children, and adults. These channels are hazardous during storms because of the high water velocities. Even more hazardous, a trash rack placed in the channel has the potential to pin a person to the rack, preventing escape from the waters. A parabolic shaped grate designed to deliver victims to safety is modeled. Results show that the grate can be appropriate for supercritical flow channels. The parabolic shape works with the velocity profile of the water by providing a flatter slope as the velocity of the flow increases. Floating objects sweep up the grate out of the flow of the water. A severe clogging factor has little effect on the grate. If the channel is designed with a hydraulic jump induced on the grate, the jump can aid in pushing a victim up the grate.
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References
1.
Aisenbrey, A. J., Jr., Hayes, R. B., Warren, H. J., Winsett, D. L., and Young, R. B. (1978). Design of small canal structures. U.S. Bureau of Reclamation, Washington, D.C.
2.
Design analysis report for west bluff outfall, Phase II‐A—Coors Road to Estancia Drive. (1990). Scanlon and Associates, Inc., Albuquerque, N.M.
3.
Design of small dams. (1987). U.S. Bureau of Reclamation, Washington, D.C.
4.
Engel, P., and Lau, Y. L. (1981). Hydraulic model study of large culvert inlet gratings. Environmental Hydraulics Section, Hydraulics Division, Nation Water Research Institute, Canada Center for Inland Waters, Toronto, Ontario, Canada.
5.
Storm Sewer Inlet Grating Design. (1981). Metropolitan Toronto Task Force, Toronto, Ontario, Canada.
6.
Weisman, R. N. (1989). “Model study of safety grating for culvert inlet.” J. Transp. Engrg., ASCE, 115(2).
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Copyright
Copyright © 1994 American Society of Civil Engineers.
History
Received: Jul 27, 1992
Published online: Jan 1, 1994
Published in print: Jan 1994
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