烟台第一海水浴场沙源匮乏型海滩地貌和表层沉积物粒度特征  

Sand-lack Type Morphology and Grain Size Characteristics of Surficial Sediments of First Public Swimming Beach in Yantai City

作　　者：解燕[1] 王张华[1] 金秉福[2] 

机构地区：[1]华东师范大学地理系,上海200062 [2]鲁东大学地理与资源管理学院,山东烟台264025

出　　处：《山东国土资源》2008年第5期37-40,共4页Shandong Land and Resources

摘　　要：在烟台第一海水浴场,利用经纬仪进行2条海滩横剖面形态测量,并在不同地貌单元采集沉积物样品进行粒度分析。测量显示,该海滩仅有小规模沙坝和沟槽体系。后滨上有风成沉积,但滩肩和海岸沙丘发育均不明显。粒度分析结果表明,海滩沉积物以中砂、粗砂为主,杂以砾或细砂,比山东半岛其他海滩沉积物明显要粗。由陆向海沉积物呈带状分布,平均高潮线附近和沙坝迎水坡侵蚀作用均显著。因此认为缺乏沙源供应的基岩岬湾式海岸是导致沙滩地貌发育不典型、海滩侵蚀作用显著的主要原因。By using theodolite, collecting sedimentary samples has small scale of bar - trough morphology of two transverse profiles are measured, and grain size are analyzed by in different zones of Yantai first public swimming beach. It is showed that the beaoh systems. The backshore has aeolian sands. But beach berm and aeolian dunes are poorly developed. Grain size analysis indicates that the beach sedimentary mainly consist of medium and coarse sand, and mixed by gravel or fine sand. Surficial sedimentary in the study area are obviously coarser. From landward to seaward, surficial sedimentary distributed in belt type. In addition, coastal erosion is very obivious in mean high tide mark and stoss - side of bar. Thus, it is regarded that the bedrock coast with insufficient sand supply which caused in non - typical morphology and intense coastal erosion of the beach.

关 键 词：地貌 沉积物粒度 第一海水浴场 山东烟台 

分 类 号：P737[天文地球—海洋地质]