粒径和沉速的频率分布特性对于描述泥沙都是必需的。
Frequency distributions of properties, e. g. size and settling velocity are necessary to the description of sediments.
粒径和沉速的频率分布特性对于描述泥沙都是必需的。
Understanding the characteristics of the project, such as backwater curve, change of hydraulic and hydrological regime (such as change of discharge and silt distribution).
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