摘要
通过对獐岛海滩的60个表层沉积物样品进行粒度试验,分析了表层沉积物粒度变化特征。研究结果表明:研究区表层沉积物细颗粒与粗颗粒存在明显的分界线,距岸约12 m范围内主要为卵砾、粗砂、中砂(<2Ф),12 m以外海滩主要为细砂(>2Ф);沉积物平均粒径为2.51Ф,由岸向海逐渐变小,以负偏、宽平峰态为主,分选性较好(σi=0.58)。潮汐和波浪是研究区表层沉积物输送的主要水动力,岬角的存在影响了沉积物粒度的分布,由粒度分布变化趋势推断沉积物输移特征为双向输运,主要以跃移搬运方式为主。
By doing particle size experiment on the 60 surface sediments which were collected on ZhangDao beach, we analyzed the characteristics of granularities of surface sediments. The results indicate that there is a clear dividing line between fine particles and coarse particles in the research. There are mainly gravel coarse sand and medium sand in the range about 12m from the shore(<2Ф),fine sand is mainly distributed outside 12m(>2Ф),he average particle size of sediment is 2.51Ф; the trend from shore to sea is gradually decreasing, most of them are negatively skewed and narrow and good sorting(σi=0.58). The main hydrodynamic forces of sediment transport are tide and wave. The headland effects the distribution of sediment grain size. Trend analysis shows that sediment transport characteristics are bidirectional transport, and mainly by jump transfer.
作者
张云
龚艳君
张笑
尤广然
吴英超
孔重人
刘明
ZHANG Yun;GONG Yan-jun;ZHANG Xiao;YOU Guang-ran;WU Ying-chao;KONG Zhong-ren;LIU Ming(Liaoning Ocean and Fisheries Science Research Institute,Dalian 116023;Dalian Key Laboratory of Sea area and Island development and protection,Dalian 116023)
出处
《矿产勘查》
2018年第8期1622-1627,共6页
Mineral Exploration
关键词
獐岛海滩
表层沉积物
粒度特征
沉积物输运
跃移搬运
辽宁
Zhangdao beach
surface sediment
particle-size distribution
sediment transport
jump transfer
Liaoning
