| 摘要: |
| 运用建立的二维非线性浪、潮和风暴潮耦合模式分析了波流相互作用下的底应力及其对耦合波浪场和流场的影响．由渤海的两次强寒潮过程的数值实验表明，在波流相互作用下，底应力明显增大，增大的底应力对波浪场影响甚微，但将明显改变水位和流速的大小，这种影响在近岸浅水区更加显著。 |
| 关键词: 底应力 彼流相互作用 水位 流速 |
| DOI： |
| 分类号: |
| 基金项目:“九五”攻关资助项目，D48970108号 |
|
| THE EFFECT OF BOTTOM FRICTION IN THE PROCESS OF WAVE-TIDE-SURGE INTERACTION |
|
JIN Zheng-hua,WANG Tao,YIN Bao-shu
|
|
Institute of Oceanology,The Chinese Academy of Sciences,Qingdao,266071
|
| Abstract: |
| A two-dimension nonlinear combined wave-tide-surge numerical model was used to study two strong Bohai Sea weather processes to analyze the influence of bottom friction on coupled wave field and current field in wave-current interaction. A wave-dependent wind stress expression was used to couple the wave numerical model and tide-surge numerical model. This study considered the effect of water level on the wave field but did not consider the effect of current on the wave field; and revealed that, in wave-current interaction, bottom friction increases obviously. Especially in shallow water, bottom friction increased 60% or more in some areas in this study. Increased bottom friction has almost no effect on the wave field, but will change the magnitude of water level and current velocity obviously. In the two processes of this study, water level increased above to 30cm in the southwestern Bohai Sea and decreased more than 30cm in the northeastern Bohai Sea. Current velocity decreased more than 30cm/s along Liaodong Bay. The overall effect of bottom friction is specially important in near-shore areas because the relative change of water level is larger than that in the deep sea. |
| Key words: Bottom friction, Wave-current interaction, Water level, Current velocity |
