THE SYNCHRONOUS COUPLING OF A THIRD-GENERATION WAVE MODEL AND A TWO-DIMENSIONAL STORM SURGE MODEL

The interaction of waves and currents is studied by the dynamical coupling of a third generation wave model and a two- dimensional storm surge model. The coupling process of the two models is implemented synchronously. To estimate the effects of waves on the generation of storm surges, Janssen's theory is used. The effects of the wave radiation stress on surge levels and the effects of storm-induced currents on waves are also investigated. The coupled wave and storm surge models have been tested by hindcasting two storm events in the northern South China Sea. The use of the Simth and Banke stress relation underestimates the surges by 10%. The inclusion of the radiation stress improves the accuracy of the computed results slightly by 2%. The introduction of a wave-dependent surface drag gives a significant improvement. The storm-induced currents clearly affect the wave characteristics at the peak stage. However, as far as the prediction of wave height is concerned, it is better not to consider the wave radiation stress in the storm surge model unless this is accompanied by a wave-dependent surface drag.

• Supplemental Notes:
  • Ocean Engng, v 23 n 6, Aug 1996, p 533 [11 p, 22 ref, 3 fig]
• Authors:
  • Zhang, M Y
  • Li, Y S
• Publication Date: 1996

Language

• English

Subject/Index Terms

• TRT Terms: Storm surges
• Uncontrolled Terms: Wave models
• Old TRIS Terms: Wave current interaction
• Subject Areas: Hydraulics and Hydrology; Marine Transportation;

Filing Info

• Accession Number: 00733697
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Mar 27 1997 12:00AM