摘要
基于2014年10月采集的滦河口近岸106个表层沉积物样品,进行了粒度分析测试,结果表明,研究区沉积物类型主要有砂、粉砂质砂、泥质砂、砂质粉砂和砂质泥五种类型,粒度组分以砂组分为主,平均粒径整体呈现从滦河口门向外逐渐变细的趋势,分选性在滦河口门为较好-中等,其余区域呈离口门越远分选性越差的趋势,峰态在大部分区域>1.1,粒度频率曲线尖锐,偏度大部分区域为极正偏,沉积物粒径参数分布具有很好的一致性。结合多元统计分析以及Flemming三角图分类法将滦河口划分为3个沉积环境区:A区为河口强动力砂质沉积区,主要位于滦河口口门及近岸区;B区为滨岸潮流砂质沉积区,位于滦河口两侧区域;C区为低能泥砂混杂区,位于新开口外侧和滦河口外17~20 m水深范围内。研究结表明,不同沉积区与粒径输运趋势具有较好的对应性。
Based on the analyses of particle size parameters of 106 surface sediment samples collected from the Luanhe Estuary in October 2014,the sediments are mainly divided into 5 types as follows,sand,silty sand,muddy sand,sandy silt and sandy mud.The surface sediments are mainly composed of sand components,but the mean grain size become smaller and smaller gradually away from the River mouth.The surface sediments in the Luanhe mouth is well sorted,but the other regions away from the mouth are relative poorly sorted.Most of the kurtoses are more than 1.1,the grain frequencies curves are sharp,and the skewness are highly positive,showing a good consistency in the spatial distribution.In addition,by using the multivariate statistical analyses and the Flemming triangulation classification,the Luanhe Estuary can be divided into the following three hydrodynamic environments,the first area is an estuarine strong dynamic sandy area,being mainly located near the 17 m isobaths in the Luanhe Estuary;the second area deposited by the offshore tidal sands is located on the two-sides of the Luanhe Estuary;and the third area is located at the Xinkaikou area and between the 17—20 m isobaths outside the Luanhe Estuary,where mud and sand are mixed under low energy hydrodynamic environment.Research shows that different sedimentary areas have good correspondence with particle size transport trends.
作者
徐国强
杜军
于晓晓
李平
付亦鹏
夏鹏
XU Guo-qiang;DU Jun;YU Xiao-xiao;LI Ping;FU Yi-peng;XIA Peng(First Institute of Oceanography,Ministry of Natural Resources,Qingdao 266061,China;Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China;Qingdao Institute of Geotechnical Investigation and Surveying,Qingdao 266034,China)
出处
《海洋科学进展》
CAS
CSCD
北大核心
2021年第3期470-482,共13页
Advances in Marine Science
基金
国家自然科学基金委员会-山东省人民政府联合基金项目——黄河三角洲地貌演变的动力机制与环境效应(U1706214)。
关键词
粒度分析
粒度参数
多元统计分析
沉积动力
grain size analysis
grain size parameters
multivariate statistical analysis
sediment hydrodynamic conditions
