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首页> 外文期刊>Estuarine Coastal and Shelf Science >Two-dimensional tide-induced residual sand transport: Applications to the Jiangsu coast, China
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Two-dimensional tide-induced residual sand transport: Applications to the Jiangsu coast, China

机译：二维潮汐诱导的剩余砂运输：在江苏海岸的应用

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The residual sand (D 62.5 mu m) transport (RST) refers to the tidally averaged rate of horizontal sand transport. Albeit much smaller than the peak rates, it determines the morphological evolution. The analytical expression for the tide-induced RST has been reported in the condition of one-dimensional tidal currents by van de Kreeke and Robaczewska (1993). Here we extended the analytical solution to two-dimensional. The constituents of the residual, M-2, and M-4 tidal current velocities were used to characterize the collinear tidal current in the orthogonal X and Y directions, i.e., cross-shore and alongshore, respectively, while the M-2 tidal constituent is dominant in both directions. Based on the solution, RST is controlled by a series of triple interactions of the M-2 tidal velocity in the X direction, M-2 tidal velocity in the Y direction, and the residual or M-4 velocity in the X or Y direction. The solution was applied to the tide-dominated continental shelf of the Jiangsu coast, China, where the alongshore current is much stronger than the cross-shore component. The results show that the triple interactions of the cross-shore M-2 tidal velocity (U-M2), the alongshore M-2 tidal velocity (V-M2), and the alongshore residual velocity account for the major parts of both the alongshore and cross-shore RST in the nearshore area. The RST patterns promote sand accumulation in the shallow nearshore area and generate a narrow and active conduit of coastal alongshore sand transport. These findings can be applied in similar marine environments to understand the effects of non-linear tidal interactions in RST.
机译：残留砂（D>62.5μm）传输（RST）是指水平砂输送的平均速率。尽管远小于峰值率，它决定了形态学的演变。 van de Kreeke和Robaczewska（1993）的一维潮流的条件报告了潮汐诱导的RST的分析表达。在这里，我们将分析解决方案扩展到二维。残留，M-2和M-4潮流电流速度的组分用于分别在正交X和Y方向上的共线潮流，即分别交叉岸和沿岸，而M-2潮汐组分在两个方向上都是占主导地位的。基于溶液，RST由X方向上的M-2潮速度的一系列三重相互作用控制，X或Y方向上的残余或M-4速度。该解决方案适用于中国江苏海岸的潮汐主导的大陆架，沿岸电流比跨海岸部件强大。结果表明，交叉岸M-2潮流（U-M2），沿岸M-2潮流（V-M2）的三重相互作用，以及沿岸的主要部分的沿岸的剩余速度账户和近岸区域的交叉岸上。 RST模式促进浅近岸区域的砂积聚，产生沿海沙滩运输的狭窄活跃的导管。这些发现可以应用于类似的海洋环境，以了解RST中的非线性潮汐相互作用的影响。

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