Experimental Evaluation of Changes in Channel Bed Morphology due to a Defective Pressure Flow Pipe
Publication: Journal of Irrigation and Drainage Engineering
Volume 145, Issue 10
Abstract
There are two types of flow in underground pipes: gravity-driven flow, such as in sewer pipes, and pressure flow, such as in syphon pipes. Defective pipes can cause extensive economic losses and have received considerable research attention; for instance, infiltration into sewer pipes through defects has been thoroughly studied. This study investigated the effect of a defect in syphon pipes on channel bed morphology; 162 experiments were performed for different Froude numbers, channel water depths, upstream heads at the defect, syphon discharges, defect discharges, defect diameters, and bed material depths above the syphon. Because syphon pipes are constructed beneath a channel bed, the characteristics and locations of the defects in syphon pipes are very difficult and costly to determine in practical applications. However, changes in channel bed morphology due to a defect in a syphon pipe can be measured. The results of this study relate the characteristics of a defect in a syphon pipe with the changes in channel bed morphology above the syphon. The results indicate that the defect diameter and Froude number are the predominant parameters that influence the channel bed morphology.
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Data Availability Statement
Some or all data, models, or code generated used during the study are available from the author by request.
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Published In
Journal of Irrigation and Drainage Engineering
Volume 145 • Issue 10 • October 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Mar 24, 2018
Accepted: Jun 3, 2019
Published online: Aug 6, 2019
Published in print: Oct 1, 2019
Discussion open until: Jan 6, 2020
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