青岛仰口湾海滩沉积物粒度特征及动力环境响应  

Grain-Size Characteristics and Dynamic Environment of Surficial Sediment in Yangkou Bay Beach in Qingdao

作　　者：韩宗珠[1] 徐翠玲[2] 周艳芝[2] 李安龙[1] 丁咚[1] 张晶[1] 

机构地区：[1]中国海洋大学海底科学与探测技术教育部重点实验室,山东青岛266100 [2]中国海洋大学海洋地球科学学院,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2013年第11期77-81,共5页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(41376053)资助

摘　　要：对青岛仰口湾两条海滩横剖面的64个表层沉积物样品进行粒度参数特征分析,结合相关地质水文及地形观测资料,探讨了潮间带的沉积物输运趋势。结果表明:研究区存在3种沉积类型,以含砾砂(g)S为主,砾质砂gS和砂质砾sG类型零星分布,几乎没有黏土组份,或含量极低。研究区海滩表层沉积物平均粒径呈带状由陆向海变细,分选变好;偏态多数为正偏,到低潮带附近逐渐变为负偏;整体峰态较尖锐,峰态多样。波浪和风是本区沉积物输运的主要动力,海滩北部夏季受到波浪的影响最大,表现为剖面整体高程降低,沉积物较粗,分选较差,偏态值高,峰态尖锐,其次为中南部的秋、冬两季。There are 64 surfiicial sediment samples collected over Yangkou beach of Qingdao, and their grain size parameters are analyzed. Surficial sediment distribution pattern and transportation trend of the beach were discussed in combination with hydrodynamic. In the studied area there exist three sedimentary types, dominated by （g）S, followed by gS, and a few sG. The fractions of sediment are basically the same, and changing with average particle sizes. From land to sea, the beach surface sediment particle size diminution, and sorting is better. Skewness are positively biased mostly, but become negative partial in low intertidal zone, and overall peak are varied and sharp. The waves and the wind is the major external force of the sediment transport, and northern beach is mainly influenced by wave in summer. For the per-formance of the whole profile, elevations are reduce, particle size coarsens, sorting is poorer, high skew-ness, peakedness sharp, and followed by central and southern in autumn and winter.

关 键 词：仰口湾 海滩沉积物 潮间带 粒度特征 动力环境 

分 类 号：P736.213[天文地球—海洋地质]