Mathematical modeling of wave distribution characteristics of breakwater project in Dong'ao Island sea area
To quantitatively demonstrate the shielding effect of the planned breakwater construction scheme on the Dong'ao Island passenger and freight terminal project in Wanshan Port Area of Zhuhai Port,the propagation deformation of nearshore waves is calculated based on the SWAN wave mathematical model and the statistical analysis results of historical typhoon wave data in the South China Sea.The Boussinesq equation mathematical model is used to analyze the wave parameters at the characteristic points in the port produced by different breakwater planning schemes under normal strong wave conditions and extreme strong wave conditions.The results show that:1)the Wanshan islands have a shielding effect on the SE direction sea waves.Therefore,the E-direction offshore waves are the control condition affecting the wave distribution in the whole port area.2)Under the action of waves with a return period of 2 years,breakwater scheme 1 can reduce H4%at each point on the north bank by about 40%,and by about 50%on the south bank,the number of working days at point N6 can be reduced from 29.9 days without breakwater to 2.6 days.Breakwater scheme 2 strengthens the cover on the north side of the bay mouth,resulting in a reduction of over 50%in wave height on the north bank and about 65%in wave height on the south bank.The working days at point N6 are further reduced to 0.7 days.3)Under the action of 50 year return period wave,the breakwater scheme 1 can reduce H13%at each point on the north bank by 30%and by 40%on the south bank.Breakwater scheme 2 can reduce H13%at each point on the north bank by 40%and by 60%on the south bank.Therefore,breakwater scheme 2 has a better covering effect on the port area than scheme 1.
Dong'ao Island sea areabreakwater projectwave mathematical modeldesign wave parameter
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