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根据大通站１９５０－１９８５年的水、沙实测资料，运用统计分析方法研究长江人河口区水、沙通量的季节性变化、年际变化以及水、沙通量之间的关系。结果表明，长江人河口区的水沙通量有明显的季节性变化，其中沙通量的变化更为显著；丰水年很少连续出现，枯水年有７５％以连续两年的形式出现；多沙年的出现形式有１年出现一次的，也有２－３年出现的，少沙年基本上以连续２－３年的形式出现；水沙通量间的相关性较差，其中细颗粒泥沙通量与水通量间基本上无相关性。
According to the measured data of water and sand in Datong station from 1950 to 1985, the relationship between water and sand flux in the estuary of Yangtze River, seasonal variation, interannual variation and water and sand flux was studied by statistical analysis. The results show that the water and sediment flux in the estuarine area of the Yangtze River has obvious seasonal changes, of which the variation of the sand flux is more significant; the sedentary years seldom occur continuously, and 75% of the dry years appear in two successive years ; The appearance of the year of dolphin appears once in one year and also in 2-3 years, while the year of juvenile basically takes the form of continuous 2-3 years; the correlation between water and sediment fluxes is poor, among them the fine Particle sediment flux and water flux basically have no correlation.