海南东方西部海域沙波和沙脊分布特征  

Study on the Distribution Characteristics of Sand Waves and Sand Ridges in the Western Sea Area of Hainan Dongfang

作　　者：张先锋 欧阳义 刘臻 程荣 刘雷 曹瑞 张军勇 ZHANG Xianfeng;OUYANG Yi;LIU Zhen;CHENG Rong;LIU Lei;CAO Rui;ZHANG Junyong(Power China Zhongnan Engineering Corporation Limited,Changsha 410014,China)

机构地区：[1]中国电建集团中南勘测设计研究院有限公司,湖南长沙410014

出　　处：《海岸工程》2023年第4期360-368,共9页Coastal Engineering

摘　　要：海南东方西南部海域海底发育大量沙波、沙脊,严重影响该海域海底工程安全。为探明该区域的海底地貌概况及微地貌特征,本论文通过侧扫声呐、浅地层剖面等方法进行了探测。探测结果表明:区域内沙波、沙脊十分发育;受沙波、沙脊等地貌单元的影响,该区域内水深多变化,地形条件复杂。根据沙波发育形态、规模等特征,共识别出沙脊、巨型沙波、大型沙波、中型沙波、小型沙波以及沙纹六个地貌类型。根据沙波沙脊发育特征及其空间组合关系推测,研究区内的沙脊发育于低海面时期的浅水高能环境,活动性较弱,沙波则主要形成于末次海侵以来高海面低能环境中,当前仍处于发育过程中。该研究结果可为区域内海底管线、桩基础等海洋工程设计、防护工作提供参考。A large number of sand waves and sand ridges are developed in the waters southwest of Dongfang,Hainan,which seriously affects the safety of underwater engineering.In order to know the seabed landform and micro-geomorphological characteristics in the waters,side-scan sonar and shallow-stratum profiler have been used for the detection.The results show that sand waves and sand ridges are very developed in the study area.Due to the influence of these geomorphological units,the water depth in the study area varies significantly and the terrain conditions are complex.Based on the morphology and scale of the developed sand waves,six geomorphological types are identified,which include sand ridges,giant sand waves,large sand waves,medium sand waves,small sand waves and sand ripples.Based on the development characteristics of the sand waves and sand ridges and their spatial combination relationships,it can be inferred that the sand ridges were developed in a high-energy environment of shallow water in the period of low sea level and are in a state of weak activity,whereas the sand waves were mainly formed in a high-sea level and low-energy environment since the last sea transgression and are still in the process of development.These results can provide references for the design and protection of ocean prohects such as submarine pipeline and pile foundation.

关 键 词：海南东方 沙波 沙脊 南海 

分 类 号：P67[天文地球—海洋地质]