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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It is suggested that a gauging station should be set up as new control index one and an effect at different levels of reservoir on erosion and deposition upstream of this station should be studied.

建议在北村至大禹渡之间增设一个水位站作为水库新的控制指标站，并开展水库不同水位对该站以上河段冲淤影响的研究。

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