Hydraulic Jumps in Turbidity Currents
1971; Geological Society of America; Volume: 82; Issue: 6 Linguagem: Inglês
10.1130/0016-7606(1971)82[1477
ISSN1943-2674
Autores Tópico(s)Hydrology and Sediment Transport Processes
ResumoResearch Article| June 01, 1971 Hydraulic Jumps in Turbidity Currents PAUL D KOMAR PAUL D KOMAR Department of Geology, University of St. Andrews, St. Andrews, Fife, Scotland AUTHOR'S PRESENT ADDRESS: DEPARTMENT OF OCEANOGRAPHY, OREGON STATE UNIVERSITY, CORVALLIS, OREGON 97331 Search for other works by this author on: GSW Google Scholar Author and Article Information PAUL D KOMAR AUTHOR'S PRESENT ADDRESS: DEPARTMENT OF OCEANOGRAPHY, OREGON STATE UNIVERSITY, CORVALLIS, OREGON 97331 Department of Geology, University of St. Andrews, St. Andrews, Fife, Scotland Publisher: Geological Society of America Received: 17 Jul 1970 Revision Received: 18 Jan 1971 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1971, The Geological Society of America, Inc. Copyright is not claimed on any material prepared by U.S. government employees within the scope of their employment. GSA Bulletin (1971) 82 (6): 1477–1488. https://doi.org/10.1130/0016-7606(1971)82[1477:HJITC]2.0.CO;2 Article history Received: 17 Jul 1970 Revision Received: 18 Jan 1971 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation PAUL D KOMAR; Hydraulic Jumps in Turbidity Currents. GSA Bulletin 1971;; 82 (6): 1477–1488. doi: https://doi.org/10.1130/0016-7606(1971)82[1477:HJITC]2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract If uniform flow conditions are approached, turbidity currents should be supercritical (Froude number greater than unity) while passing through submarine canyons, and subcritical (Froude number less than unity) in the upper submarine fan channel. The change in flow regime requires that the current pass through a hydraulic jump in the vicinity of the canyon mouth. During the jump, the velocity of the flow would be reduced and its thickness markedly increased. The aspects of such hydraulic jumps are examined.The quantitative analysis of hydraulic jumps in turbidity currents is based upon solutions of the momentum flux equation and the equation resulting from the assumption of a continuity of sediment flux. It is found that for the average submarine canyon-channel system, the flow would more than double in thickness and its velocity would be halved during a hydraulic jump. The entrainment of water through the interface of the flow during the jump is significant in reducing the density of the current. The higher the initial Froude number, the greater the expected density reduction. However, the density reduction due to the jump is probably not sufficient to convert a high-density slide into a low-density turbidity current. There must be an initial density reduction by entrainment while the slide is passing through the canyon at high Froude number. Turbulence generated within the hydraulic jump would stir the flow and help to insure suspension of its sediment. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
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