闽南浅滩西北区沙波地形地貌及运动趋势研究  

The study of sand wave geomorphology and movement trends in the northwestern region of the Minnan shoal

作　　者：王雁冰 李丁硕 费严铖 WANG Yanbing;LI Dingshuo;FEI Yancheng(Shanghai Eastsea Marine Engineering investigation,Desian&Research Institute Co.ltd.,Shanghai 200120,China)

机构地区：[1]上海东海海洋工程勘察设计研究院有限公司,上海200120

出　　处：《海洋测绘》2025年第1期48-52,共5页Hydrographic Surveying and Charting

基　　金：基于深远海的海上风电选址和支撑技术研究项目(HNKJ20-H66)。

摘　　要：为初步了解闽南浅滩多尺度沙波地形地貌特征及运动趋势,选择浅滩西北侧沙波区开展地形及上覆沙波精细地貌研究。根据闽南浅滩多尺度沙波分类体系,将区块内发现的沙波分为一级沙波、次级沙波和沙波纹三类,多尺度沙波分布区地形嶙峋。研究表明:一级沙波呈NW-SE向展布,具有北坡陡、南坡缓的不对称性,波谷区地形平坦,受东北向涨潮流流速大于西南向落潮流的底层海流影响,存在向东北运动的趋势;次级沙波多发育在一级沙波南坡,走向与一级沙波平行,具有良好的对称性,受区域往复流海流的影响,存在向浅滩南北两端运动的趋势;沙波纹分布在一级沙波北坡,波纹脊线与一级沙波脊线存在30°~50°的夹角。研究结果可为该海域的工程建设与海洋科学基础研究提供重要参考。In order to gain a preliminary understanding of the geomorphologic characterization and movement trends of multi-scale sand waves in Minnan shoal sea area,the sand wave area in the northwest side was selected to conduct research on the detailed topography of the terrain and overlying sand waves.According to the multi-scale classification system of sand waves in Minnan shoal sea area,the sand waves are divided into three categories:primary giant sand waves,secondary sand waves and sand ripples.The results indicate that the regional terrain is rugged because of the multi-scale sand wave topography within the area.The primary giant sand waves are distributed in the NW-SE direction,with an asymmetry of steep north slope and gentle south slope.The terrain of the valley area is flat,and there is an overall trend of moving towards the northeast due to the influence of ocean currents with a northeast rising current velocity greater than a southwest falling current at the bottom layer.The secondary sand waves develop on the southern slope of the primary giant sand waves,and the sand ridges run parallel to the primary,exhibiting positive symmetry.Due to the influence of reciprocating currents,there is a tendency to move towards the north and south ends of Minnan shoal respectively.The sand ripples are distributed on the north slope of the primary giant sand waves,ridges of which generally have an angle of 30°to 50°with the primary.The results of this study can provide important references for the engineering construction and basic research of marine science in the sea area.

关 键 词：海底沙波 地形特征 沙波分类 运动趋势 闽南外海浅滩 

分 类 号：P229.1[天文地球—大地测量学与测量工程]