黄河口水下三角洲海底冲蚀沟发育的动力机制探讨

常瑞芳; 崔青; 欧素英

黄河口水下三角洲海底冲蚀沟发育的动力机制探讨

青岛海洋大学海洋地球科学学院, 青岛 266003

基金项目: 国家自然科学基金资助项目(编号:49476291)

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出版历程
- 收稿日期: 1998-01-28
- 修回日期: 1998-10-27

Study of dynamic mechanism for the formation and growth of gullylandform on the subaqueous delta near old Huanghe River mouth

Ocean University of Qingdao, Qingdao 266003

摘要

摘要: 根据老黄河口外水下三角洲海底冲蚀沟的地貌特征,用动力学方法分析了其形成发育机制.结果表明,波浪近底流是冲蚀沟形成发育的主导因素.冲蚀沟内的湍流及其次生的横向环流构成了复杂的流场,由此产生的边界切应力对冲蚀沟的侵蚀及沉积物的悬浮、扩散起重要作用.冲蚀沟的断面形态与流场结构密切相关.
- 老黄河口 /
- 水下三角洲 /
- 冲蚀沟 /
- 波浪 /
- 二次流
Abstract: Based on the features of gully landform on the subaqueous delta near old Huanghe River mouth, a dynamical method to analyse mechanism for the growth of gully was used. It is shown that wave-induced near bed current is the dominant factor which leads to growth of gully. Secondary current caused by turbulent fluctuation in the gully makes velocity field very complicated. And boundary shear stress caused by them has an important effect on erosion of gully, and suspension and dispersion of sediment. The pattern of gully's lateral profile is related intimatey to the velocity field of main and secondary current.
- Old Huanghe River mouth /
- subaqueous delta /
- gully /
- wave /
- secondary current

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参考文献(12)

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文章访问数: 818
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