养护海滩形态演化特征及时空差异性分析——以秦皇岛浪淘沙浴场为例

发布时间：2018-02-16 15:37

本文关键词： 海滩养护形态演化侵蚀强度时空差异　出处：《海洋地质与第四纪地质》2017年03期 　论文类型：期刊论文

【摘要】：海滩养护是修复受侵蚀海滩最快捷而有效的方法,在国内外已得到了大量的工程应用。工程后,海滩地貌形态为适应新的地形、水动力和沉积物条件而调整到新的平衡状态的过程中,海滩剖面发生了先急后缓的形态变化。对秦皇岛浪淘沙浴场养滩工程后连续36个月的海滩形态监测数据进行分析,结果表明海滩单宽体积平均增加约63.87m~3/m,岸线平均向海推进约14m,海滩填沙保存量占填沙总量的79.16%,达到工程目标,养滩效果良好。海滩形态演化过程中,侵蚀强度呈明显的时空差异性:养滩初期海滩侵蚀严重,之后侵蚀强度呈减弱趋势。受波浪、水位、风向等因素的季节性变化影响,平均海滩侵蚀量夏秋季明显高于冬春季。受东侧基岩岬头和填沙量差异的影响,东段位于遮蔽段内,且相对凹岸,利于淤积,而西侧位于切线段,且相对凸岸,侵蚀强烈。
[Abstract]:Beach conservation is the quickest and most effective method to restore eroded beach, and has been applied in a large number of projects at home and abroad. After the project, the beach geomorphology is adapted to the new topography. In the process of adjusting to a new equilibrium state under hydrodynamic and sediment conditions, the beach profile changes at first and then slowly. The beach morphology monitoring data for 36 months after the beach cultivation project of Langtao beach in Qinhuangdao are analyzed. The results show that the average single width volume of beach increases about 63.87mg / m, the average shoreline advances toward the sea about 14m, and the amount of sand reclaimed by beach accounts for 79.16m of the total amount of sand reclaimed. The project goal is reached, and the effect of beach conservation is good. In the course of beach morphology evolution, The erosion intensity is obviously different in time and space: the beach erosion is serious at the initial stage, and then the erosion intensity tends to weaken, which is affected by the seasonal variation of wave, water level, wind direction and so on. The average beach erosion in summer and autumn is obviously higher than that in winter and spring. The eastern part is located in the sheltered section, and is relatively concave, which is favorable for siltation, but the west side is located in the tangent section and is relatively convex, and the erosion is strong.
【作者单位】：河北省地矿局秦皇岛矿产水文工程地质大队;河北省海洋地质资源调查中心;中国海洋大学海洋地球科学学院;
【基金】：河北省科学技术研究与发展计划项目(11276709D) 基础勘查项目冀海涵(2015)98号资助项目
【分类号】：P748

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