Dynamics of the buoyant plume off the Pearl River Estuary in summer

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Title Dynamics of the buoyant plume off the Pearl River Estuary in summer
Author Ou, Suying; Zhang, Hong; Wang, Dong-xiao
Journal Name Environmental Fluid Mechanics
Year Published 2009
Place of publication Netherlands
Publisher Springer
Abstract Field measurements of salinity, wind and river discharge and numerical simulations of hydrodynamics from 1978 to 1984 are used to investigate the dynamics of the buoyant plume off the Pearl River Estuary (PRE), China during summer. The studies have shown that there are four major horizontal buoyant plume types in summer: Offshore Bulge Spreading (Type I), West Alongshore Spreading (Type II), East Offshore Spreading (Type III), and Symmetrical Alongshore Spreading (Type IV). River mouth conditions, winds and ambient coastal currents have inter-influences to the transport processes of the buoyant plume. It is found that all of the four types are surface-advected plumes by analysing the vertical characteristic of the plumes, and the monthly variations of the river discharge affect the plume size dominantly. The correlation coefficient between the PRE plume size and the river discharge reaches 0.85 during the high river discharge season. A wind strength index has been introduced to examine the wind effect. It is confirmed that winds play a significant role in forming the plume morphology. The alongshore wind stress and the coastal currents determine the alongshore plume spreading. The impact of the ambient currents such as Dongsha Current and South China Sea (SCS) Warm Current on the plume off the shelf has also assessed. The present study has demonstrated that both the river discharge and wind conditions affect the plume evolution.
Peer Reviewed Yes
Published Yes
Alternative URI http://dx.doi.org/10.1007/s10652-009-9146-3
Copyright Statement Copyright 2009 Springer-Verlag. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. The original publication is available at www.springerlink.com
Volume 9
Issue Number 5
Page from 471
Page to 492
ISSN 1567-7419
Date Accessioned 2009-10-19
Language en_AU
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Environmental Engineering Modelling; Environmental Monitoring; Physical Oceanography
URI http://hdl.handle.net/10072/29586
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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