大亚湾大鹏澳菱角石水下沿岸沙坝成因  

GENESIS OF LINGJIAOSHI UNDERWATER LONGSHORE BAR AT DAPENGAO IN DAYA BAY

作　　者：孙宗勋[1] 赵焕庭[1] 

机构地区：[1]中国科学院南海海洋研究所,广州510301

出　　处：《海洋通报》1992年第2期45-49,共5页Marine Science Bulletin

摘　　要：在分析了大亚湾大鹏澳菱角石海区波浪、潮流和泥沙资料后,提出该处发育的水下沿岸沙坝是偶发生性台风大浪破碎后泥沙横向搬运的结果。长期的常风浪造成的沿岸纵向输沙叠加在沿岸沙坝之上,使得沙坝表层物质粒级由东向西沿程变细。由于该水下沿岸沙坝是因台风浪破碎形成的,故它能够在台风浪过后长期的常风浪作用下继续存在。By analysing the wave and sediment data of Lingjiaoshi longshore area at Dapengao in Daya Bay, it is advanced that Lingjiaoshi underwater longshore bar is the result of the onshore and offshore movement of sand, which is caused by breaking typhoon wave. Littoral transport sand by long period common wave adds new deposit to the bar. The surface sediment grade of the bar becoming finer gradually along the bar westwards. It can continue to exist under the action of the long period common wave after typhoons.

关 键 词：泥沙 沙坝 成因 沿岸 大亚湾 

分 类 号：P737.14[天文地球—海洋地质]