辽东浅滩海域潮流运动特征及其与潮流脊发育的关系

本文基于多站海流周日连续观测资料,分析了辽东浅滩海域流场状况,尤其是潮流运动的特征。并初步探讨了潮流运动与辽东浅滩潮流脊发育的关系。结果表明,该区潮流运动的下列特征,对于潮流脊的形成和发育起着最重要的作用。<1>辽东浅滩海域以潮流为主的流场,基本呈北—南向的往复运动。(2)潮流流速一般为0.5～1m/s,且分布不均匀。有从南向北递减之趋势。但在沙脊北部,流速有所增加。(3)该区潮流为非正规半日潮流。涨、落潮明显不对称。涨潮流的流速和历时皆大于落潮流。数值试验表明,在海底地形和潮流的关系中,潮流仍起着主导作用。

Characteristics of the Tidal Current Mivement and Its Relationship withe the Dev

In this paper, the state of the flow field, especially the characteristics of thetidal current movement, in Liaodong shoal are analysed based on the diurnal continuous observations of the flow at several statins. Meanwhile, the relationship betvveen the tidal current movement and the development of the tidal curren tridge is also examined. Results show that the following features of the tidal current movement play a very important role in the formatin and developmen of the tidal curren tridge: 1) The tidal current dominating in the flow field fo Liaodong Shoal moves back and forthe in a north-south direction. 2) The velocity fo the current is 1-2 knotes, but its distribution is not even and tends to decrease from south to north progressively. However,the velocity increases after the current passes the ridges. 3) In the studied area, the tidal current belings to a non-regular semi-diurnal current. The flood and ebb are obviously unsymmetrical. Both the velocity and duration of the flood are larger than those of the ebb. In addition, the numerical tests indicate that the tidal current movement plays a domiant role in the relationship between topography and tidal current.