山东省近岸海域沉积物类型及变化趋势  

Types and Changing Trends of Sediments in the Coastal Waters of Shandong Province

作　　者：由丽萍 赵玉庭 孙珊 张娟 谷伟丽 董晓晓 李佳蕙 马元庆 YOU Liping;ZHAO Yuting;SUN Shan;ZHANG Juan;GU Weili;DONG Xiaoxiao;LI Jiahui;MA Yuanqing(Shandong Marine Resource and Environment Research Institute,Shandong Key Lab of Marine Ecological Restoration,Yantai 264006,China)

机构地区：[1]山东省海洋资源与环境研究院山东省海洋生态修复重点实验室,烟台264006

出　　处：《海洋开发与管理》2022年第1期77-81,共5页Ocean Development and Management

基　　金：山东省重点研发计划(重大科技创新工程)(2020CXGC011404);山东省重点研发计划(重大科技创新工程)(2019JZZY020705);山东省海洋生态修复重点实验室开放基金(201910)。

摘　　要：文章依据山东省近岸海域表层沉积物调查资料,分析了沉积物粒度的时空变化特征及其影响因素。结果显示:2020年,山东省近岸海域表层沉积物粒径总体呈由近岸向远海逐渐变小的趋势,其中,粉砂含量最高,平均66.45%;砂次之,平均26.78%;黏土含量较低,平均6.77%。沉积物不同粒级组分具有明显的空间分布差异性,类型包含粉砂、砂质粉砂、粉砂质砂和砂,以粉砂为主,占调查站位的61.9%。2016—2020年,山东省近岸海域表层沉积物整体呈现粗化的趋势,其中,日照、青岛、潍坊和滨州近岸海域粗化趋势较为明显,东营次之,烟台和威海粗化程度最低。沉积物粒度时空特征的主要影响因素包含物源、区域水动力条件(如,渤海和黄海海流、山东省沿岸流等)及沿海海岸工程建设情况,具体的影响机制仍需进一步调查研究。本研究成果可以为山东省近岸海域底质类型变化分析和海岸带保护与利用提供参考。Based on the survey data of surface sediments in Shandong coastal waters,the temporal and spatial variation characteristics of sediment granularity and its influencing factors were analyzed.The results showed that in 2020,the grain size of surface sediments in Shandong coastal waters gradually decreased from shore to sea,and silt content was the highest,with an average of 66.45%,sand content was the second,with an average of 26.78%,clay content was lower,with an average of 6.77%.There were significant differences in the spatial distribution of sediment grain fractions,including silty sand,sandy silty sand,silty sand and sand,and silty sand was dominant,accounting for 61.9%of the survey site.From 2016 to 2020,an overall coarsening trend of surface sediments in Shandong coastal waters was detected.And the trend was more obvious in the coastal waters of Rizhao,Qingdao,Weifang and Binzhou,followed by Dongying,and the lowest in Yantai and Weihai.The main influencing factors of the temporal and spatial characteristics of sediment granularity include provenance,regional hydrodynamic conditions(such as the Bohai Sea Current,Yellow Sea Current,Shandong Coastal Current,etc.),and coastal engineering construction,and furthermore,the specific influencing mechanism still needs further investigation and research.The research results could provide a reference for the analysis of changes in sediment types and the protection and utilization of coastal zones in the coastal waters of Shandong Province.

关 键 词：近岸海域 沉积物 粒度 时空变化 影响因素 山东省 

分 类 号：P76[天文地球—海洋科学] X820.2[环境科学与工程—环境工程]