浪、潮、风暴潮联合作用下的底应力效应  

THE EFFECT OF BOTTOM FRICTION IN THE PROCESS OF WAVE－TIDE－SURGE INTERACTION

作　　者：金正华[1] 王涛[1] 尹宝树[1] 

机构地区：[1]中国科学院海洋研究所,青岛266071

出　　处：《海洋与湖沼》1998年第6期604-610,共7页Oceanologia Et Limnologia Sinica

基　　金："九五"攻关资助!D48970108

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。A two－dimension nonlinear combined wave－tide－surge numerical model was usesd tostudy two strong Bohai Sea weather Processes to analyze the influence of bottom friction on coupledwave field and current field in wave－current interaction. A wave－dependent wind stress expressionwas used to couple the wave numerical model and hde－surge numerical model. This studyconsidered the effect of warer level on the wave field bu did not consider the effect of current onthe wave field, and revealed that, in wave－current interaction, bottom friction increases obviously.Especially in shallow water, bottom friction increased 6O% or more in some areas in this study.Increased bottom friction has almost no effect on the wave field, but will change the magnitude ofwater level and current velocity obviously. In the two processes of thes study, water level increasedabove to 30cm in the southwestern Bohai Sea and decreased more than 30cm in the northeasternBohai Sea Current velocity decreased more than 30cm / s along Liaodong Bay. The ovetall effect ofbottom friction is specially impotant in near－shore areas because the relative change of water levelis larger than that in the deep sea.

关 键 词：底应力 波流相互作用 水位 流速 风暴潮 

分 类 号：P731.23[天文地球—海洋科学]