| 黄河口的变迁对滨海大陆架区流场变化的影响 |
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| 引用本文： | 乐肯堂,周参武.黄河口的变迁对滨海大陆架区流场变化的影响[J].海洋科学集刊,1995(36):93-109. |
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| 作者姓名： | 乐肯堂 周参武 |
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| 作者单位： | 中国科学院海洋研究所;国家海洋局北海监测监视中心 |
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| 基金项目： | 中国科学院海洋研究所调查研究报告第2320号 |
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| 摘 要： | 黄河口附近滨海大陆架区流场的分布特征与黄河口的变迁有十分密切的关系。近百年来,黄河尾闾大的改道有10次。50年代以来,黄河口的流路又经过了三次大的改道，即1954年1月-1963年的神仙沟流路,1964年1月-1975年的钓口河流路和1976年以来的清水沟流路。每次黄河口的大改道,都对其周围滨海大陆架区的流场(包括潮流和余流)的分布和性质带来巨大的影响。对于黄河口滨海大陆架区流场的分布变化,尽管以往已有了不少研究1)，2),但迄今尚未有人把黄河口附近流场分布变化特征与黄河口的变迁联系起来进行研究。
为了研究黄河口的变迁对其滨海大陆架区流场变化的影响,作者以1976年黄河最近次大改道为例,把现有的50年代末以来本研究区各个时期的实测资料分为两个历史阶段,即改道前的黄河口区阶段和改道后的黄河口区阶段。本文将分别分析这两个阶段的潮流和余流分布变化等基本特征,以及探讨黄河口的变迁对于其周围流场影响的基本特征。
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| 关 键 词： | 黄河口、滨海大陆架区、流场变化 |
| 收稿时间： | 1993/11/12 0:00:00 |
INFLUENCE OF CHANGES OF THE HUANGHE RIVER ESTUARY ON THE CURRENT FIELD IN ITS ADJACENT SHELF AREA |
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| Le Kentang,Zhou Canwu.INFLUENCE OF CHANGES OF THE HUANGHE RIVER ESTUARY ON THE CURRENT FIELD IN ITS ADJACENT SHELF AREA[J].Studia Marina Sinica,1995(36):93-109. |
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| Authors: | Le Kentang Zhou Canwu |
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| Institution: | Institute of Oceanology, Academia Sinica; North Sea Survey &t Surveillance Center, SOA |
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| Abstract: | Historical data show that each of the 10 great changes of the Huanghe River Estuary (HRE) that occurred since 1855 influenced greatly the current field in its adjacent shelf area. Taking the latest change as an example, this paper analyzes the basic behaviours of tidal and residual currents before and after the change. The main conclusions from this study are as follows.(1) The frequent changes of the HRE have changed the properties of tidal currents in some nearshore area off the Huanghe River Delta (HRD).For example, tidal currents in the offshore area betewwn the Shenxiangou Dtream Outlet (SSO)and the Diaokouhe Stream Outlet (DSO),used to be regularly semi-diurnal in 1958-1959 when the HRE was located around
the SSO, became irregularly semi-diurnal in 1965 when the HRE was located around the DSO. (2) Although tidal currents in the most nearshore section off the HRD are approximately rectilinear, with the major axis of the current ellipse roughly parallel to the coast, the M2 constituent of tidal current on both sides of the waterrunning HRE is of rotary characteristic and varies with the change of the HRE.(3) There exist two characteristically high current speed regions off the HRD. One is associated with the amphidromic point of the M2 constituent off the SSO, the other with the water-running HRE, and varies with the change of the HRE. (4)The residual currents off the HRD are mainly wind-driven currents with significant seasonal variation. (5)There are many unstable meso-scale eddies off the waterrunning HRE, which cause local upwelling. |
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