摘要
采用多波束资料对胶州湾口的海底沙波类型、特征进行了研究,发现研究区主要有线性沙波(二维)、沙丘(三维)2种沙波类型。结合水流流速、海底构造和表层沉积物综合分析发现:海底沙波缓坡朝向与优势流向不完全一致,为强流作用的产物,在涨、落潮作用下均可形成;沉积物的多寡是研究区海底沙波类型分布的决定因素,海底松散沉积物较为丰富的地区形成二维沙波。在水动力强大的胶州湾口,沉积物多分布在构造低洼地带,使二维线性沙波的分布与海底断裂延伸方向一致。
The most recent SeaBeam data show the characteristics and classification of the sand waves in Jiaozhou Bay. There are two types of sand waves, 2-dimensional linear sand waves, 3-dimensional cuspate sand waves at the mouth of Jiaozhou Bay. The developing factors are discussed based on the current velocity, seabed tectonics and sediment distribution. The gentle slope of the sand waves does not all develop downstream of the dominant flow, so that the sand waves are variational, they can only develop under strong tidal currents, and under both the flood and ebb currents because of their large velocities; The sediment is the key factor of the distribution of the sand waves, which show that the 2-dimensional linear sand waves are mainly located along the tectonic zone where more sediment was trapped because of the existence of a concave trough.
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2006年第2期327-330,共4页
Periodical of Ocean University of China
关键词
沙波
多波束
沉积物
构造线
胶州湾
sand waves
SeaBeam
sediment
dominant flow
Jiaozhou Bay
