摘要
本文设计彩沙示踪法于厦大滨海沙滩东段进行试验 ,取得了沙粒运动方向、最大运移速度、扩散范围、沿岸输沙率及粒度分异运移状态等定量数据 ,弥补了以往示踪法难以定量分析的缺陷。结果表明 :调查期间 ,厦大滨海沙滩东段沙粒运动是构成厦门岛南岸岸滩在偏东向波浪作用下形成的西南向沿岸漂沙之一个环节 :沙粒大体平行岸线向北运动 ;沙粒沿岸最大运移速度为 2 0 0m/d ;经一个潮周期 ,沙粒向两侧的最大横向扩散距离为 2 0m ,最大垂直扩散深度达 7cm ;岸滩横断面沿岸输沙率为 42 5t/d ;在该岸段沿岸漂沙中 ,粗粒沙偏向低潮带一侧 ,而细粒沙偏向高潮带。
The tracing method of coloured sand designed in this paper was tested in the eastern section of Xiamen University beach. A whole series of quantitative data of the bedload movement were obtained including sand transport direction and velocity; the sand spread scope; sand longshore transport rate and the sand transport characteristic of granulormetric differentiation. It overcame the defect of traditional tracing without quantitative results. The result showed that in the testing period, sand transport in eastern section of Xiamen University Beach was a link of the southwestward coastal sand drift chain of Xiamen Island Beach under the easterly wave. The following conclusions were drawn from the test:sand transported towards the north roughly parallel to the shoreline;the maximum transport speed reached 200 m/d; the maximum crosswise spread distance in a tidal cycle was 20m, and the maximum vertical spread depth was 7cm; the sand longshore transport rate was 425 t/d; and the coarser sand tended to move to the low tide zone and the finer sand tended to move and gather at the high tide zone in north part of the tested beach.
出处
《台湾海峡》
CAS
CSCD
2000年第3期310-315,共6页
Journal of Oceanography In Taiwan Strait
基金
福建省自然科学基金!资助项目(D95009号)
