The Library
Laboratory modelling of the effects of temporal changes of estuarine-fresh-water discharge rates on the propagation speed of oceanographic coastal currents
Tools
Thomas, P. J. (Peter J.) and Linden, P. F. (2010) Laboratory modelling of the effects of temporal changes of estuarine-fresh-water discharge rates on the propagation speed of oceanographic coastal currents. Journal of Fluid Mechanics, Vol.664 . pp. 337-347. doi:10.1017/S0022112010004702 ISSN 0022-1120.
|
PDF
WRAP_Thomas_Laboratory_modelling_effects.pdf - Published Version - Requires a PDF viewer. Download (748Kb) |
Official URL: http://dx.doi.org/10.1017/S0022112010004702
Abstract
In this paper, results of laboratory experiments simulating buoyancy-driven coastal currents produced by estuarine discharges into the ocean, are discussed. The responses of the propagation speeds of the currents to increases and decreases of the volumetric discharge rate at the source are investigated. For increasing discharge rate, we find that the mean speed of the current head displays a sharp rise some time after the source discharge condition has changed. In contrast, a decrease of the current speed following a decreasing discharge rate proceeds gradually. The current speed after acceleration or deceleration is found to be equal to the speed that would be expected had the discharge been at the higher or lower rate from the start of the experiment. The relative speed at which the information of the changed discharge condition at the source approaches the advancing current head from upstream, for both increasing and decreasing discharge rates, is found to be approximately one to three times the mean speed of the current. Further, we find that this transmission speed is 0.82 +/- 0.20 times the propagation speed of a linear, long interfacial Kelvin wave.
Item Type: | Journal Article | ||||
---|---|---|---|---|---|
Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TC Hydraulic engineering. Ocean engineering |
||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||
Library of Congress Subject Headings (LCSH): | Ocean currents, Estuarine hydrology | ||||
Journal or Publication Title: | Journal of Fluid Mechanics | ||||
Publisher: | Cambridge University Press | ||||
ISSN: | 0022-1120 | ||||
Official Date: | December 2010 | ||||
Dates: |
|
||||
Volume: | Vol.664 | ||||
Number of Pages: | 11 | ||||
Page Range: | pp. 337-347 | ||||
DOI: | 10.1017/S0022112010004702 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Date of first compliant deposit: | 19 December 2015 | ||||
Date of first compliant Open Access: | 19 December 2015 |
Data sourced from Thomson Reuters' Web of Knowledge
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |
Downloads
Downloads per month over past year