海岸沙坝剖面和滩肩剖面形态及悬移质输沙率特征实验研究
发布时间：2019-05-11 19:21
【摘要】：通过物理模型实验研究了海岸沙坝剖面的运动规律,不同调制系数波浪所产生的沙坝海岸悬移质输沙率特征以及沙坝剖面向滩肩剖面转化过程。测量了不同时刻沙坝剖面几何形状以及悬移质浓度、水平流速及悬移质输沙率。给出了平衡剖面上泥沙粒径的分布。实验中考虑了两种初始坡度(1:20和1:10)和不同波浪形态(规则波、波群和不规则波)。结果表明,沙坝产生后存在向岸和离岸两种运动形态,但最终将停留在稳定位置。悬移质输沙率总是离岸的,悬移质浓度大小和其与沙坝相对位置、坝峰水深以及波群调制系数有关。
[Abstract]:By means of physical model experiments, the movement law of coastal sand dam profile, the characteristics of sediment transport rate produced by waves with different modulating coefficients and the transformation process from sand dam profile to beach shoulder profile are studied. The geometric shape, suspended mass concentration, horizontal velocity and suspended sediment transport rate of sand bar profile at different times were measured. The distribution of sediment particle size on the equilibrium profile is given. Two initial slopes (1:20 and 1:10) and different wave patterns (regular waves, wave groups and irregular waves) are considered in the experiment. The results show that there are two kinds of movement patterns: shore movement and offshore movement, but will stay in a stable position at the end of the day. The suspended sediment transport rate is always offshore, and the concentration of suspended sediment is related to the relative position of the dam, the depth of the peak water and the modulation coefficient of the wave group.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV148
本文编号：2474782
[Abstract]:By means of physical model experiments, the movement law of coastal sand dam profile, the characteristics of sediment transport rate produced by waves with different modulating coefficients and the transformation process from sand dam profile to beach shoulder profile are studied. The geometric shape, suspended mass concentration, horizontal velocity and suspended sediment transport rate of sand bar profile at different times were measured. The distribution of sediment particle size on the equilibrium profile is given. Two initial slopes (1:20 and 1:10) and different wave patterns (regular waves, wave groups and irregular waves) are considered in the experiment. The results show that there are two kinds of movement patterns: shore movement and offshore movement, but will stay in a stable position at the end of the day. The suspended sediment transport rate is always offshore, and the concentration of suspended sediment is related to the relative position of the dam, the depth of the peak water and the modulation coefficient of the wave group.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV148
【参考文献】
相关期刊论文 前2条
1 尹晶;邹志利;李松;;波浪作用下沙坝不稳定性实验研究[J];海洋工程;2008年01期
2 吴国强;邹志利;张海飞;;海岸沙坝近底悬移质通量实验研究[J];海洋工程;2013年01期
，本文编号：2474782
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