冬季黄河口及邻近海域悬浮体粒级组成和分布研究  

The grain-size distribution of the suspended particulate matter in the Huanghe Estuary and its adjacent area in winter

作　　者：曾明[1] 范德江[1] 孙效功[2] 王帅[1] 杨作升[1] 

机构地区：[1]中国海洋大学海底科学与探测技术教育部重点实验室,山东青岛266100 [2]中国气象局气象科学研究院,北京100081

出　　处：《海洋学报》2010年第4期129-138,共10页

基　　金：国家重大基础研究发展计划项目(2005CB422304);国家自然科学基金项目(40976020)

摘　　要：利用LISST—100激光粒度仪于2006年11月在黄河口及附近海域进行现场粒度调查,揭示了冬季低流量下悬浮体粒度组成和空间分布特征,分析了其制约因素和沉积动力学意义。研究表明,黄河口悬浮体平均粒径为3.00Φ—6.41Φ,平均值为4.66Φ;粒度分布为非正态分布,在表层、中层悬浮体的粒度分布呈双峰和三峰两种模式,在底层则为单峰模式和双峰模式;在表层、中层悬浮体的搬运方式以递变悬浮为主,在中层有少量为跳跃搬运,而底层的悬浮体主要以跳跃搬运为主。黄河口悬浮体粒度组成受底质类型、冲淤状态、黄河径流、海洋动力以及絮凝和生物作用等多种因素的共同影响。The grain-size of suspended particulate matter in the Huanghe Estuary and its adjacent area was investigated with an in situ laser grain-size analyzer in November 2006.The grain-size parameters and distribution patterns vary strongly in the horizontal and vertical directions.The results show that（1） the mean grain-size of the suspended particulate matter ranges from 3.00Φ to 6.41Φ,with an average value of 4.66Φ;（2） the grain-size distribution patterns of the suspended sediment include three types,e.g.,monomode,bimode and trimode;（3） C-M patterns suggest that transportation forms of the suspended particulate matter not only include suspended transportation,but bed load transportation.The bed load transportation mainly appeared at the bottom layer.The grain-size pattern and distribution were basically controlled by the Huanghe discharge,hydrodynamics,surface sediment type,and chemical and biological conditions.

关 键 词：冬季 黄河口 悬浮体粒度 空间分布 影响因素 

分 类 号：P736.2[天文地球—海洋地质]