摘要
通过分析181个埕北海域底质沉积物样品的粒度资料,并应用Flemming三角图示法对研究区进行沉积动力环境分区,结果表明:研究区底质沉积物主要为粉砂质砂、砂质粉砂、粉砂和黏土质粉砂4种类型,整体上由岸向海粒度呈现细-粗-细的分布特征,且呈条带状与岸线平行;粒度相对较粗,粒径频率曲线多以单峰为主,分选中等偏差,多为正偏;沉积动力环境分区表明该海域沉积物多以悬浮和跃移为主;粒度特征和沉积动力强度以6 m和12 m等深线为轴对称分布,12 m水深等值线两侧沉积物的分布类型和运移趋势主要受季节的风浪变化控制,6 m水深等值线两侧沉积物分布和运移趋势主要受波浪破碎的紊流作用控制。
Based on the analysis of 181 grain size testing data which sampled in Chengbei sea area, and the application of Flemming triangular diagram method in the study area, the results show that the sediments are mainly composed of silty sand,sandy silt, silt and clayey silt. Grain size is comparatively coarse, and the grain size frequency curves are mostly unimodal pattern. Dynamic environment analysis shows that the sediments in the study area are mostly suspensible and saltatory. Grain size characteristics and sedimentary response strength are symmetrical along the water depth of 6 m and 12 m. Distribution and transport of sediments along the water depth of 12 m are mainly controlled by the seasonal variation of wind wave, and controlled by the zone of wave breaking along the water depth of 6 m.
出处
《海洋通报》
CAS
CSCD
北大核心
2017年第5期554-560,577,共8页
Marine Science Bulletin
关键词
埕北海域
底质沉积物
粒度分布
沉积动力环境
Chengbei sea area
surface sediment
sediment distribution
dynamic environment
