摘要
对长江口哺层底质样品粒度参数的统计表明：１、沉物在总体表现为水下环境粗潮滩，口内河道粗于口外海滨，南支粗于北支，北港粗于南港；同时，河道在纵向上有自上游变细、横向上有自深槽向浅滩细的趋势。２．平均粒径Ｍｚ（Ф）普遍大于Ф５０，特别是沙级样品。两者差值最大可达１、４４、３。粒径的标准偏差σ１与平均粒径Ｍｚ之间存在良好的线性正相关关系，相关系数一般大于０．９０、４．９７％的样品粒径的偏度ＳＫ１大于０。
Based on 262 bottom sediment samples of the Yangtze Rivet Estuary, the paper deals with statistic features of the grain-size Folk Parameters. The results show that: (a) sediment is coarser in the submerged area than on the tidal flats, in the river mouth than out of the mouth,upstream than downstream, in deep channel than on shallow shoal. (b) for an individual sample, Mz(φ) is usually bigger than φ50, especially for silty sediment, and the difference can reach to 1. 44. (c) σ1 is directly correlative with Mz and f (correlative coefficient) is often bigger than 0. 90. (d) 97% of the SK1 are negative. (e) both critical φ between jump group and suspended group, and content of suspended group are directly correlative to Mz(φ) according to the analysis of accumulative probability curves. Most of these characteristics are relevant to the hydrodynamic environments of the tidal estuary.
出处
《泥沙研究》
CSCD
北大核心
1994年第3期23-31,共9页
Journal of Sediment Research
