【摘要】：通過物理模型實驗研究了海岸沙壩剖面的運動規(guī)律,不同調(diào)制系數(shù)波浪所產(chǎn)生的沙壩海岸懸移質(zhì)輸沙率特征以及沙壩剖面向灘肩剖面轉(zhuǎn)化過程。測量了不同時刻沙壩剖面幾何形狀以及懸移質(zhì)濃度、水平流速及懸移質(zhì)輸沙率。給出了平衡剖面上泥沙粒徑的分布。實驗中考慮了兩種初始坡度(1:20和1:10)和不同波浪形態(tài)(規(guī)則波、波群和不規(guī)則波)。結(jié)果表明,沙壩產(chǎn)生后存在向岸和離岸兩種運動形態(tài),但最終將停留在穩(wěn)定位置。懸移質(zhì)輸沙率總是離岸的,懸移質(zhì)濃度大小和其與沙壩相對位置、壩峰水深以及波群調(diào)制系數(shù)有關(guān)。
[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.
【學位授予單位】：大連理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TV148

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本文編號：2474782