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首页> 外文会议>International Conference on Estuaries and Coasts >PHYSICAL MODEL STUDY OF SHOAL-SCOURING POOL-SEDIMENTATION IN THE CHANNEL-RIDGE SYSTEM OF THE RADIATE SAND RIDGES IN SOUTH YELLOW SEA
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PHYSICAL MODEL STUDY OF SHOAL-SCOURING POOL-SEDIMENTATION IN THE CHANNEL-RIDGE SYSTEM OF THE RADIATE SAND RIDGES IN SOUTH YELLOW SEA

机译：南黄海辐射砂脊通道 - 山脊系统浅滩泥沙沉积物理模型研究

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摘要

Based upon the 1963-2005 bathymetry data in the Xitaiyangsha area in the mid-southern part of the radiant sand ridges in combination with analysis on tidal, wave characteristics and sediment properties, the paper explores the mechanisms responsible for long-term evolution of the Xitaiyangsha channel-ridge system under tidal dynamics and the accidental occurrences of shoal scouring and pool sedimentation by big waves. The present study conducted physical model experiments that successfully replayed the interactions of wave with tide in the area of the radiant sand ridges and modeled the process of shoal scouring and pool sedimentation by the "Matsa" typhoon. Through seven different-return-period experiments on sediment activities under the co-action of wave and tide, the characteristics and evolution pattern of the shoal scouring and deep-pool sedimentation in different wave conditions are analyzed. It is concluded that the shoal scouring and pool sedimentation occur mainly in waters where ridge and channel distribute alternatively; high-tide big waves and low-tide breaking waves could cause the strongest scouring of the shallow-water bank slopes; the local sediment transport from bank slope to deep pool in a stationary-wave tidal environment constitutes the responding processes of shoal-scouring & pool-sedimentation; with the topographic change, the scouring-sedimentation magnitude by consecutive big waves with different return periods in one experiment is far less than that accumulated by single-big-wave with the same return period experiments.
机译：基于1963 - 2005年南部南部部分中南部部分南部部分的散阳地区，结合潮汐，波特性和泥沙特性分析，探讨了Xitaiyangsha的长期演变负责的机制潮汐动力学下的频道 - 脊系统和大波浪挖掘和池沉降的意外发生。本研究进行了物理模型实验，成功地重放了潮砂脊区域的潮汐与潮汐的相互作用，并通过“松软”台风进行了模拟了浅滩灌水和池沉降的过程。通过七种不同返回期关于波浪和潮的共同作用下的沉积物活动的实验，分析了不同波条件下浅层洁华和深泳池沉降的特点和演化模式。得出结论是，浅滩冲洗和池沉降主要发生在脊​​和通道分配的水域中;高潮大波浪和低潮破碎波可能会导致浅水库斜坡最强的冲刷;局部沉积物运输到静止波潮环境中的银行斜坡到深池构成了浅滩灌水和池沉降的响应过程;通过地形变化，在一个实验中具有不同返回时段的连续大波的冲洗沉降幅度远远低于通过相同返回期实验的单大波累积的大波。

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