|
|||||
|
|
| 长江口悬浮体粒度特征及其季节性差异 | |
| 引用本文： | 李 军,高 抒,曾志刚,贾建军.长江口悬浮体粒度特征及其季节性差异[J].海洋与湖沼,2003,34(5):499-510. |
| 作者姓名： | 李 军 高 抒 曾志刚 贾建军 |
| 作者单位： | 1. 中国科学院海洋研究所,青岛,266071;中国科学院研究生院,北京,100039 2. 京大学海岸与海岛开发教育部重点实验室,南京,210093 3. 中国科学院海洋研究所,青岛,266071 |
| 基金项目： | 中国科学院知识创新工程项目“中国主要河口及邻近陆架海域海陆相互作用研究” ,KZCX2 2 0 7号，国家自然科学基金资助项目 ,4 0 1 76 0 2 0号 |
| 摘 要： | 1998年11月和1999年5月长江口悬浮体样品的激光粒度仪分析结果表明，长江口悬浮体粒度较细，分选较差，偏态和峰态偏小，粒度组成以粉砂为主；粘土含量次之，基本不含砂或砂含量很小，由陆向海平均粒径有由粗到细的变化趋势。粒度分布呈典型的非正态分布，存在“双峰”和“三峰”两种形式，表层样品以“双峰”分布为主，底层“三峰”或“双峰”并存。标准偏差-粒度曲线上多峰出现，反映了长江口悬浮体组成的复杂性。长江口悬浮体粒度特征有较大的季节变化。悬浮体粒度变化的影响因素包括泥沙来源、底质再悬浮、生物作用和絮凝作用，粒度特征的季节差异是这些因素综合作用的结果。 |
| 关 键 词： | 长江口 悬浮体 粒度分布 季节变化 激光粒度仪 |
| 收稿时间： | 2002/10/5 0:00:00 |
| 修稿时间： | 2002年10月5日 |
PARTICLE-SIZE CHARACTERISTICS AND SEASONAL VARIABILITY OF SUSPENDED PARTICULATE MATTERS IN THE CHANGJIANG RIVER ESTUARY |
|
| LI Jun,GAO Shu,ZENG Zhi-Gang and JIA Jian-Jun.PARTICLE-SIZE CHARACTERISTICS AND SEASONAL VARIABILITY OF SUSPENDED PARTICULATE MATTERS IN THE CHANGJIANG RIVER ESTUARY[J].Oceanologia Et Limnologia Sinica,2003,34(5):499-510. | |
| Authors: | LI Jun GAO Shu ZENG Zhi-Gang and JIA Jian-Jun |
| Institution: | Institute of Oceanology, The Chinese Academy of Sciences;Institute of Oceanology, The Chinese Academy of Sciences;Institute of Oceanology, The Chinese Academy of Sciences;Ministry of Education Key Laboratory of Coast and Island Development, Nanjing University |
| Abstract: | Grain size compositions of 78 samples of suspended particulate matter collected from the Changjiang River estuary during November 1998 and May 1999 were analyzed with a Cilas-940L Laser Grain-size Analyzer.The results show that the suspended sediment consists mainly of fine-grained (silt) materials,relatively poorly sorted,with small skewness and kurtosis values; the grain size decreases in the seaward direction.The particle-size distribution curves show bimodal or multi-modal patterns,and several peaks are present in the curves of the standard deviation versus particle size.The correlation between the SPM concentration and the median particle-size is poor,but it is high between the inorganic particle content and D 50,indicating that the terrigenous detritus content of SPM is an important factor controlling the particle size of the SPM.Further,there is significant seasonal variability of the particle-size characteristics.The main factors affecting the variability include sediment sources,tidally-induced resuspension of bottom sediment,biological activity,and flocculation of fine-grained particles. |
| Keywords: | Suspended particulate matter Grain-size distributions Seasonal variability Changjiang River estuary |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |
| 点击此处可从《海洋与湖沼》浏览原始摘要信息 | |
| 点击此处可从《海洋与湖沼》下载免费的PDF全文 | |