| Li Luping. 1997. A model for wave growth in fetch-limited conditions. Acta Oceanologica Sinica, (1):45－56 |
| A model for wave growth in fetch-limited conditions |
| A model for wave growth in fetch-limited conditions |
| Received:August 10, 1994 Revised:January 25, 1995 |
| DOI： |
| Key words:Wave growth fetch-limited wave field universal relationship |
| 中文关键词: Wave growth fetch-limited wave field universal relationship |
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| Abstract: |
| In this paper,it is held that the universal relationships of wave growth in fetch-limited conditions,i.e.,fp=Ax-B and m0=CxD should satisfy the Toba 3/2 power law and the wave energy balance equation.In the ideal generation situation,theoretically it can be derived that the ideal fetch-limited wave growth relationship should have D=3B and D+B=1,(i.e.,B=0.25,D=0.75) and A3C=2.1×10-4Cd1/2,where Cd is the drag coefficient.The 3/2 power law,the wave energy balance equation and the decrease of wave steepness with increasing fetch have became three requirements which should be satisfied by fetch-limited wave growth algorithms.A semi-empirical and semi-theoretical model for fetch-limited wave growth is presented.In the application to the slanting wind situation an universal relationship of dimensionless wave energy vs dimensionless peak frequency is presented and the comparisons show that the model is in good agreement with observations. |
| 中文摘要: |
| In this paper,it is held that the universal relationships of wave growth in fetch-limited conditions,i.e.,fp=Ax-B and m0=CxD should satisfy the Toba 3/2 power law and the wave energy balance equation.In the ideal generation situation,theoretically it can be derived that the ideal fetch-limited wave growth relationship should have D=3B and D+B=1,(i.e.,B=0.25,D=0.75) and A3C=2.1×10-4Cd1/2,where Cd is the drag coefficient.The 3/2 power law,the wave energy balance equation and the decrease of wave steepness with increasing fetch have became three requirements which should be satisfied by fetch-limited wave growth algorithms.A semi-empirical and semi-theoretical model for fetch-limited wave growth is presented.In the application to the slanting wind situation an universal relationship of dimensionless wave energy vs dimensionless peak frequency is presented and the comparisons show that the model is in good agreement with observations. |
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