人工砾石海滩变化及输移率研究

发布时间：2018-06-07 17:39

本文选题：人工砾石滩 + 形态演化　；参考：《海洋工程》2017年05期

【摘要】：在我国采用砾石海滩在某些强动力区域进行海滩养护是一种新的尝试,具有很好的适用性。以厦门天泉湾人工砾石滩为研究对象,对2015年至2016年间10条海滩剖面开展了5次周期性监测,通过综合分析,得出在人工砾石滩竣工完成后的一年时间内,滩肩外沿线、岸线及滩面底角的砂砾分界线大幅度后退,滩肩宽度变窄;滩肩外沿线明显隆起,形成滩肩脊线;滩面坡度变大,且上游侧海滩的滩面普遍比下游侧海滩的滩面陡,一年后,岸滩整体变化趋于稳定。针对砾石滩不断向西南方向运移的现状,采用Leo C.van Rijn输移率公式计算砾石滩年平均输移率,并通过测量断面法、体积变化量法对Leo C.van Rijn公式计算结果进行验证,得出砾石滩年平均输移率的范围约为1 015.66~2 392.5 m~3/a。
[Abstract]:It is a new attempt to adopt gravel beach in some strong dynamic areas in our country, and it has good applicability. Taking the artificial gravel beach of Tianquan Bay in Xiamen as the research object, five periodic monitoring of 10 beach sections from 2015 to 2016 were carried out. Through comprehensive analysis, it was concluded that within one year after the completion of the artificial gravel beach, the beach along the shoulder of the beach was located. The gravelly boundary between the shoreline and the bottom corner of the shoreline recedes by a large margin, and the width of the beach shoulder becomes narrower; the beach along the shoulder rises obviously and forms the beach shoulder ridge line; the slope of the beach surface becomes larger, and the beach surface on the upstream side of the beach is generally steeper than that of the beach on the downstream side of the beach. One year later, The overall change of the shoreline tends to be stable. In view of the current situation of the gravel beach moving to the southwest, Leo C. van Rijn transport rate formula is used to calculate the annual average transport rate of gravel beach. The calculation results of Leo C. van Rijn formula are verified by measuring section method and volume variation method. It is concluded that the average annual transport rate of gravel beach is about 1 015.66 ~ 2 392.5 m ~ (3 / a) 路a ~ (-1) 路m ~ (-1) ~ (-1).
【作者单位】：福州大学土木工程学院;国家海洋局海岛研究中心;国家海洋局第三海洋研究所;
【基金】：国家海洋公益性行业科研专项资助项目(200905008,201405037) 国家自然科学基金青年科学基金项目(41406070)
【分类号】：P748

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