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Interfacial instabilities at the lutocline in the Jiaojiang estuary, China
Jiang, J.; Mehta, A.J. (2002). Interfacial instabilities at the lutocline in the Jiaojiang estuary, China, in: Winterwerp, J.C. et al. (Ed.) (2002). Fine sediment dynamics in the marine environment. Proceedings in Marine Science, 5: pp. 125-137
In: Winterwerp, J.C.; Kranenburg, C. (Ed.) (2002). Fine sediment dynamics in the marine environment. Proceedings in Marine Science, 5. Elsevier: Amsterdam. ISBN 0-444-51136-9. XV, 713 pp., more
In: Proceedings in Marine Science. Elsevier: Amsterdam. ISSN 1568-2692, more
Peer reviewed article

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Keyword
    Marine
Author keywords
    Buoyancy; cohesive sediment; erosion; sediment-water interface; sediment transport

Authors  Top 
  • Jiang, J.
  • Mehta, A.J.

Abstract
    Interfacial instabilities at the lutocline in the Jiaojiang estuary, China, were examined on a preliminary basis. Internal waves at two distinct frequencies were detected from acoustic records. The 0.38 m high low-frequency (0.09 rad/s) wave, close to the shallow water wave regime, was near the buoyancy frequency. The high-frequency (1.33 rad/s) wave of 0.21 m height was in deep water with sharp crests and flat troughs possibly due to interfacial shear. With increasing Richardson number the height and frequency of both wave types decreased, whereas the celerity and wave length increased. A straightforward phenomenological framework is used to examine these trends.

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