-
摘要: 根据长江口历年海图，分析南港瑞丰沙串沟的形成机理.瑞丰沙头南淤导致南港上段主流南偏，主流受南岸顶托后，使南港中段主流北偏并冲刷瑞丰沙体下段形成串沟.20世纪90年代末，宝山北水道的发展以及南沙头通道丰富的泥沙来源是瑞丰沙头南淤的主要成因.2002年9月的南港实测水文资料以及水动力模拟结果证实了南港主流的摆动情况.Abstract: Based on history charts for the Yangtze River Estuary, formation mechanism of the Ruifeng Shoal ditch was analyzed. With the head part of the Shoal siltting southward, the upside mainstream direction turns southward in the South Channel. Bounced by southern bank, the mainstream will turn northward in the middle part of the South Channel and erode the lower part of the Ruifeng Shoal. Then a ditch on Ruifeng Shoal appears. In the end of 1990s, development of Baoshan North Channel and large amount of sediments from the Nanshatou Channel induced the siltation southward in the head part of the Shoal. The deduction was testified by the tidal current survey and the flow modeling.
-
点击查看大图
计量
- 文章访问数: 2918
- HTML全文浏览量: 11
- PDF下载量: 1134
- 被引次数: 0
下载: