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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。
In this paper, color sand tracer method was designed to test the eastern section of Haaduhai Beach, and the quantitative data such as the movement direction of sand particles, the maximum migration velocity, the diffusion range, the sediment transport rate and the granularity migration status were obtained. Tracing method is difficult to quantitative analysis of defects. The results show that during the investigation, the sand movement in the eastern segment of Xiamen-Haibin Beach is one of the links that form the southwestern coast of the south bank of Xiamen Island. The maximum transport velocity along the bank is 200m / d. After one tidal cycle, the maximum lateral diffusion distance of sand to the two sides is 20m and the maximum vertical diffusion depth is 7cm. The sediment transport rate along the banks of the cross-section is 42 5t / d; in the littoral drift along the coast, the coarse sand tends to one side of the low tide belt, while the fine sand tends to the high tide zone.