福建东山湾1954～2008年间的海底冲淤变化

发布时间：2018-01-26 12:15

本文关键词： 海洋地质学冲淤变化水深资料对比人类活动东山湾　出处：《应用海洋学学报》2016年01期 　论文类型：期刊论文

【摘要】：本文通过对比东山湾20世纪50、70、90年代和2008年等不同时期的海图和实测水深资料,对东山湾内近50 a间的海底冲淤变化特征进行了分析.结果表明:1954~2008年间,东山湾经历了从淤积向冲刷的转变.20世纪50年代至70年代,东山湾内滩涂和水下浅滩主要呈淤积特征,并以0、2 m等深线变化最大;20世纪70年代至90年代,东山湾内滩涂、水下浅滩及潮汐通道的水深和位置变化均较小,仅局部略有调整;20世纪90年代至2008年,东山湾整体呈冲刷状态,并以东北部和西南部最为明显.总体来看:东山湾内近50 a间的海底冲淤变化区域主要发生在水动力较弱的滩涂和水下浅滩区;东山湾口门潮汐通道处,长期处于冲淤动态平衡中.除了自然因素,漳江上游峰头水库的建成、东山湾东北部围垦、西南部八尺门海堤的建成及21世纪以来湾内海砂开采是近50a间东山湾局部冲淤变化的控制因素.
[Abstract]:In this paper, the charts and measured bathymetric data of Dongshan Bay in different periods, such as the 1950s and the 2008, are compared. The characteristics of submarine scour and siltation in Dongshan Bay during the past 50 years are analyzed. The results show that during the period of 1954-2008. Dongshan Bay experienced the transition from siltation to scouring. From 50s to 70s, the tidal flat and the underwater shoal in Dongshan Bay mainly showed the characteristics of siltation, with the maximum variation of 0 ~ 2 m isobath. From 1970s to 90s, the water depth and position of the tidal flat, the underwater shoal and the tidal channel in Dongshan Bay changed slightly, but only partially adjusted. From 1990s to 2008, Dongshan Bay was scoured. In general, the area of seabed scour and siltation in Dongshan Bay during the past 50 years mainly occurred in the tidal flat with weak hydrodynamic force and the area of underwater shoal. The tidal passage of Dongshan Bay is in the dynamic balance of erosion and siltation for a long time. In addition to natural factors, the completion of Fengtou Reservoir in the upper reaches of the Zhangjiang River and the reclamation in the northeast of Dongshan Bay. The completion of the Badzhimen seawall in the southwest and the exploitation of sea sand in the bay since 21th century are the controlling factors for the local erosion and siltation in Dongshan Bay in the past 50 years.
【作者单位】：厦门大学海洋与地球学院;国家海洋局第三海洋研究所;中国海洋大学海洋地球科学学院;
【基金】：国家自然科学基金资助项目(40976037)
【分类号】：P736
【正文快照】： (1.厦门大学海洋与地球学院,福建厦门361102;2.国家海洋局第三海洋研究所,福建厦门361005;3.中国海洋大学海洋地球科学学院,山东青岛266100)海湾因其特殊的地理位置和良好的掩护条件,且湾内营养盐和初级生产力资源丰富,是发展海上交通、水产养殖、旅游及能源产业的优良场所[1]

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