Study on the Characteristics of Temporal and Spatial Changes in Properties of Surface Sediment on Near-Shore Seabed of Strong-Tide Bay: A Case from the North Bank of Hangzhou Bay in Shanghai

详细信息   

• 责任者：Zhao Jianchun （State Key Laboratory of Estuarine and Coastal Research ; East China Normal University ; Shanghai 200062 ; China） ; Dai Zhijun
• 刊名：Acta Sedimentologica Sinica
• 出版年：2008
• 卷期：26(6)
• 关键词：河口湾沉积作用 ; estuarine sedimentation ; 浙江 ; Zhejiang
• 页码：p.1043-1051
• 图表：7 illus., 3 tables, 24 refs.
• 分类号：0200
• issnNo：ISSN1000-0550
• isbnNo：CN62-1038/P

摘要

Grain size parameter is the most important information of sediment, which can point out the characteristics of distribution and transportation. Based on analysis data of 167 samples which were collected from the north coast of Hangzhou Bay in June 2005 and December 2006, a study on the rules of temporal and spatial changes in properties of seabed surface sediment in strong-tide bay is conducted. As well as, through the Grain Size Transport Analysis model, a conveying trend analysis of sediment in this basin has been studied, in the base of which a research of sand sources is primarily discussed. Finally, the response process of tidal flat sediment to the high-energy hydrodynamic environment is also analyzed. The results indicate that: 1) the grain size of tidal flat sediment in north coast of Hangzhou Bay is generally small, and silty clay is the main sediment types in this basin; 2) the vertical difference of grain size characteristics is more obvious than the transversal, and also there is some seasonal variation between flood season and withered season; and 3) the results of GSTA-model show that, the sediment of this basin is mainly from the upstream and the sea waters.