华南沿海若干砂质海滩沉积物粒度特征的分析

Analysis on grain size characteristics of sediments on some sandy beaches along the coast in South China

根据2003年7月在华南沿海12个砂质海滩所取得的76个沉积物样品(其中次表层样品36个,不计入研究范围),就该区的沉积物粒度特征展开论述。为了便于分析其沉积物粒度特征,我们把华南沿海12条海滩剖面根据岸滩形态和成因将华南砂质海岸划分为岬湾型砂质海岸、沙坝-潟湖型砂质海岸和夷直型砂质海岸三大类。阐述了不同类型海滩的表层沉积物的粒度特征、类型、分布以及粒度的沿程变化特征。

Based on 76 sediments on 12 sandy beaches in July 2003 in South China （36 sublayer sediments included, but not analyzed in this paper）, granulometric characteristics are discussed.Sandy beaches are classified as cape-bay sandy beaches, barrier-lagoon sandy beaches, and straightened sandy beaches in order to analyze the characteristics of grain size. The grain-size characteristics, types, distribution of surface layer sediments for the three types of coasts have been studied in the paper. The variation of characteristics of sediments along the distance has been also discussed.