Date of Award:
5-2014
Document Type:
Thesis
Degree Name:
Master of Science (MS)
Department:
Civil and Environmental Engineering
Committee Chair(s)
Blake P. Tullis
Committee
Blake P. Tullis
Committee
Michael C. Johnson
Committee
Paul J. Barr
Abstract
A hydraulically undersized control structure could result in water overtopping a dam or channel banks. To increase hydraulic capacity and reduce flooding risk, nonlinear spillways are frequently replacing linear weirs. This study investigates four subjects to further knowledge for two types of nonlinear weir, the piano key and labyrinth. Weir submergence is a condition when the downstream water level of a weir exceeds the weir crest elevation, and can influence the head-discharge relationship of the structure. The effects of submergence on laboratory-scale piano key weir head-discharge relationships were evaluated experimentally and compared to published submergence data for linear and labyrinth weirs. For relatively low levels of submergence, the piano key weir requires less upstream head relative to the labyrinth weir (<6%). This increase in efficiency was reversed at higher levels.
Checksum
c079228bf4d2f8fb92c242533d97a507
Recommended Citation
Dabling, Mitchell R., "Nonlinear Weir Hydraulics" (2014). All Graduate Theses and Dissertations. 2189.
https://digitalcommons.usu.edu/etd/2189
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