青岛市灵山湾海水浴场表层沉积物粒度冬季变化特征及其原因  

Variation in characteristics of surface sediment particle size and influencing factors in winter at the Lingshanwan Beach, Qingdao

作　　者：赵永芳[1,2] 徐方建[3] 刘清容[4] 李安春[1] 王心怿 吴锦祥 刘航宇 陈铭 李丽君 

机构地区：[1]中国科学院海洋研究所,山东青岛266071 [2]胶州湾海洋生态系统国家野外科学观测研究站,山东青岛266071 [3]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [4]国家海洋局北海预报中心,山东青岛266061

出　　处：《海洋科学》2016年第3期108-117,共10页Marine Sciences

基　　金：国家自然科学基金(41430965;41106040);青岛市基础研究计划项目(13-1-4-197-jch);中央高校基本科研业务费专项资金项目(12CX02003A);中国科学院战略性先导科技专项(XDA05030401)~~

摘　　要：于2013年11月、2014年1月及3月在青岛市灵山湾海水浴场进行了3次表层沉积物采样,对粒度组分和粒度参数平面分布的变化进行了分析。结果表明,本区沉积物整体有变粗的趋势,细砂组分特别是极细砂和粉砂组分含量下降明显,分选性变好,正偏态及高峰度分布区扩大,粒度参数高值分布区被消除。粒径趋势分析表明,在涨潮流与强盛的冬季风驱动的风浪、沿岸流的综合作用下,研究区沉积物总体呈北东-南西向沿岸输运,运移趋势变化受到波浪、潮流水动力条件与地形相互作用的影响。短期的波能变化足以改变沙滩地貌,从而影响表层沉积物的分布。可为浴场维护提供理论依据。In this study, we sampled surface sediments three times at the Lingshanwan Beach, Qingdao in November 2013, and January and March 2014. We then examined the particle size compositions and grain size distributions of the surface sediment. Results show that the grain size of the surface sediment became coarser and the sorting became better over the study period. The fine sand components decreased significantly, especially the very fine sand and silt. The region of positive skewness and high kurtosis expanded and the high-value area of the grain size parameters changed significantly, and was ultimately eliminated. Our grain-size trend analysis results indicate that the sediments were transported from the NE to the SW along the coast, which is affected by wind-driven waves in winter, coastal currents, and flood currents. Short-term fluctuations of wave energy can reshape the beach topography and affect the distribution of surface sediments. These results provide a theoretical basis for beach management.

关 键 词：表层沉积物 粒度趋势分析 灵山湾浴场 青岛 

分 类 号：P736.2[天文地球—海洋地质]