Trends and laws of runoff extreme and extreme events at Yichang gauging station for the period 1882-2002 are investigated in this paper.

以宜昌站1882 ~ 2002年日流量资料为例，分析了非汛期和汛期的径流极值与极端事件的演变趋势与演变规律。

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Based on the data from Datong gauging station of Yangtze River, the grain-size characteristics of suspended sediment has been studied by using regression analysis.

以大通站为例，用回归分析的方法研究了长江入海悬移质泥沙的粒度特征。

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This paper uses the sediment rating curve to simulate the sediment flux on the basis of on-site measured SSC and published values from the Datong Hydrological Gauging Station for the past 40 years.

依据水沙关系模型，对过去近40年来大通水文站提供的泥沙实测值和公布值做了计算，并在此基础上作了修正。

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