江苏西洋海域潮流流速剖面参数的相位分析  

Phase Analysis of the Parameters of Tidal Current Velocity Profile in Xiyang Sea Waters of Jiangsu

作　　者：倪志辉[1] 宋志尧[2] 

机构地区：[1]河海大学海洋学院水文水资源与水利工程科学国家重点实验室,江苏南京210098 [2]南京师范大学虚拟地理环境教育部重点实验室,江苏南京210097

出　　处：《海洋通报》2009年第3期1-9,共9页Marine Science Bulletin

基　　金：国家自然科学基金重点资助项目(50339010)

摘　　要：正确地了解潮流流速、水深、粗糙长度,摩阻流速等随时间变化过程的相位关系,对研究浅海潮流的特性有重要的作用。在总结了潮流摩阻流速确定方法的基础上,对江苏西洋海域的实测资料进行了流速剖面参数计算和相位分析,得出结论:①浅海潮流的摩阻流速达到最大值时间要早于平均流速,并从理论上得到验证;②受海底潮流紊动切应力的影响,从表层到底层的流速沿水深随时间变化,底层的最大流速到达时间比上层及表层的要稍微提前;③在一个潮周期中,达到最大值的时间是先摩阻流速和粗糙长度,然后是流速,最后是水深。It has an important role for the study of the characteristics of shallow tidal current to understand correctly the phase relationship of tidal velocity, water depth, roughness length, friction velocity changing as the time varied. On this basis, the methods of friction velocity were summarized, and the parameters of velocity profile were calculated and phase analysis was carried out through the measured data of Xi-yang sea waters of Jiangsu. The results show that： （1） the time of fi＇iction velocity to achieve the maximum is earlier than that of the average velocity in shallow tidal current, and was verified in theory. （2）by the influence of submarine turbulent shear stress, the maximum velocity at the bottom of the flow is slightly ahead of that of the upper and the surface along the water depth over the time. （3） in a tidal cycle, the first is the friction velocity and roughness length at the same time, then tidal velocity, finally, the water depth.

关 键 词：潮流 水深 粗糙长度 相位分析 摩阻流速 江苏西洋海域 

分 类 号：P731.23[天文地球—海洋科学]