THE USE OF GRAIN SIZE TRENDS IN MARINE SEDIMENT DYNAMICS: A REVIEW

作     者：MichaelCollins 高抒 

作者机构：InstituteofOceanologyChineseAcademyofSciencesQingdao266071China SchoolofOceanandEarthSciencetheUniversitySouthamptonS0143ZHUK 

出 版 物：《Chinese Journal of Oceanology and Limnology》 (中国海洋湖沼学报（英文版）)

年 卷 期：2001年第19卷第3期

页      面：265-271页

核心收录：

学科分类：070704[理学-海洋地质] 0709[理学-地质学] 07[理学] 0707[理学-海洋科学] 

基　　金：ThisstudywasstartedwhenSGwasworkingattheUniversityofSouthampton (England)andissupportedfinanciallybytheNationalNaturalScienceF 

主　　题：Grain size trend vectors sediment transport marine environment 

摘      要：Spatial changes in grain size parameters (i.e. grain size trends) contain information on sediment transport patterns. An analytical procedure has been proposed to transform the grain size trends into an image of trend vectors, which may represent net sediment transport pathways. A fundamental assumption for such an approach is that the frequency of occurrence of the trend adopted is much higher in the transport direction, than in any of other directions. Preliminary studies show agreement between this assumption and observations. However, further investigations into the physical processes and mechanisms for the formation of grain size trends are required to improve the technique, including flume experiments and numerical modeling. Moreover, attention should be paid to the trends associated with fine grained sediment, for the method of grain size trend analysis is so far designed for coarse grained material only. The processes of flocculation during settling and the wash load property must be considered. Appropriate interpretation of grain size data will improve our understanding of the physics of granular materials.