摘要
Abstract
In order to master the distribution and change characteristics of the seabed sediment of the 4th phase project area in Shanghai Yangshan Deepwater Port, columnar sampling was carried out. The analysis results of columnar samples demonstrate that:there are four sedimentary types in the 4th phase project area, such as sandy silt, sand-silt-clay, silt and clayey silt. About 66%of all samples is silt, and 21.74%of all samples is sandy silt. The median size of sediment is 0.085~0.049 1 mm, and the average value is 0.028 mm. In comparison of each layer of columnar samples, the surface layer material is the finest. Average value of median size is 0.026 mm, and it increas-es from upper layer to lower layer gradually. Compared with water area of the completed port district, the surface lay-er material of the 4th phase project area is coarser than that in channel between Dayangshan and Xiaoyangshan is-lands, and the sorting degree is slightly better. Component of sedimentary type is basically the same, however, the content of silt is higher.关键词
沉积特征/沉积类型/中值粒径/洋山港Key words
depositional characteristics/sedimentary type/median size/Yangshan Port分类
建筑与水利
