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- Title
长江口底床沉积物粒度分布特征及测定方法对比研究.
- Authors
杨海飞; 杨世伦; 孟 翊; 朱 强; 吴创收; 史本伟
- Abstract
Sediment grain size analyses for 179 seabed samples in the Yangtze Estuary were conducted by both traditional (pipette and sieving) and laser (Coulter, LS-100Q, USA) methods. Our results show that the sediments in the North Channel and the upper reach of the inner Yangtze Estuary are mainly sands and silty sands, usually coarser than those in the South Channel. The deposits in the South Channel and the Northern Hangzhou Bay are mainly clayey silt. Meanwhile, silty sands cover the most northern part of the outer estuary, and are apparently coarser than the clayey silty in the southern part of the outer estuary. The sediments in the outer estuary off the South Channel mainly reflect the modern deposits, while the sediments off the North Channel are dominated by relict Pleistocene sands. As to the measurement methods, there are apparent distribution patterns of relative size from the two methods. Moreover, regression analyses for the five parameters, including mean size, median size, standard deviation, skewness, and kurtosis, were conducted to obtain reliable conversion formulas for the two methods. These can be used in future studies for comparison with historical data.
- Subjects
YANGTZE River Estuary (China); PARTICLE size distribution; SEDIMENT analysis; STANDARD deviations; SILT
- Publication
Shanghai Land & Resources / Shanghai Guotu Ziyuan, 2017, Vol 38, Issue 4, p75
- ISSN
2095-1329
- Publication type
Article
- DOI
10.3969/j.issn.2095-1329.2017.04.016