海口湾波浪漫滩区及其邻近水域悬沙观测特征初步分析
发布时间：2018-11-06 11:27
【摘要】：波浪漫滩是海滩上水陆分界线随波峰向岸推进,随波谷向海回退的现象,它是近年来海岸水沙运动研究的前沿科学问题,其水沙运动观测分析更是需要优先研究的课题。选择海口湾假日海滩,在2013年11月下旬进行了波浪漫滩区及其邻近水域悬沙观测,观测结果表明:1在进行漫滩流速分析时,分别对上爬和回退的平均速度进行统计,两个坡度下上爬速度大于回退速度分别占80%和65%,说明波浪漫滩过程上爬速度通常要大于回退速度;2波浪漫滩区比邻近水域的平均含沙量高1 000倍左右;3波浪漫滩区内从海向岸的悬沙浓度逐渐降低,下界(靠海侧)、中间位置、上界(靠岸侧)的平均悬沙浓度分别为67 059.6mg/L、50 290.9 mg/L、15 762.0 mg/L;4波浪漫滩区悬沙浓度变化随机性强,对其测量和特征分析提出了更高的要求。
[Abstract]:Wave floodplain is a phenomenon that the boundary between water and land advances along with the wave peak and recedes to the sea with the wave peak on the beach. It is a leading scientific problem in the research of coastal water and sediment movement in recent years, and the observation and analysis of its water and sediment movement need to be studied first. In the late November 2013, suspended sediment observation was carried out on Haikou Bay Holiday Beach and its adjacent waters. The results show that: (1) the average velocity of climbing and retrogression are counted respectively in the analysis of the velocity of the floodplain. The climbing speed is 80% and 65% respectively under the two slopes, which indicates that the climbing speed is usually larger than the retrogression velocity in the process of wave flooding. (2) the average sediment content in the romantic beach is about 1 000 times higher than that in the adjacent waters; (3) the suspended sediment concentration in the wave floodplain decreases gradually from the coast, and the average suspended sediment concentration of the lower boundary (near the sea side), the middle position and the upper boundary (shore side) are 67,059.6 mg / L ~ (50) 290.9 mg/L,15 / (762.0 mg/L;), respectively. The change of suspended sediment concentration in the romantic beach area of wave 4 is very random, and higher requirements are put forward for the measurement and characteristic analysis of the suspended sediment concentration.
【作者单位】： 河海大学港口海岸与近海工程学院;解放军理工大学气象海洋学院;
【基金】：国家自然科学基金(41206163,41076048) 中央高校基本科研业务费项目(2011B05714)资助
【分类号】：P731.2;P714
本文编号：2314136
[Abstract]:Wave floodplain is a phenomenon that the boundary between water and land advances along with the wave peak and recedes to the sea with the wave peak on the beach. It is a leading scientific problem in the research of coastal water and sediment movement in recent years, and the observation and analysis of its water and sediment movement need to be studied first. In the late November 2013, suspended sediment observation was carried out on Haikou Bay Holiday Beach and its adjacent waters. The results show that: (1) the average velocity of climbing and retrogression are counted respectively in the analysis of the velocity of the floodplain. The climbing speed is 80% and 65% respectively under the two slopes, which indicates that the climbing speed is usually larger than the retrogression velocity in the process of wave flooding. (2) the average sediment content in the romantic beach is about 1 000 times higher than that in the adjacent waters; (3) the suspended sediment concentration in the wave floodplain decreases gradually from the coast, and the average suspended sediment concentration of the lower boundary (near the sea side), the middle position and the upper boundary (shore side) are 67,059.6 mg / L ~ (50) 290.9 mg/L,15 / (762.0 mg/L;), respectively. The change of suspended sediment concentration in the romantic beach area of wave 4 is very random, and higher requirements are put forward for the measurement and characteristic analysis of the suspended sediment concentration.
【作者单位】： 河海大学港口海岸与近海工程学院;解放军理工大学气象海洋学院;
【基金】：国家自然科学基金(41206163,41076048) 中央高校基本科研业务费项目(2011B05714)资助
【分类号】：P731.2;P714
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