The measured data show that the bedload sediment transport rate is related more closely to the effective stream power within the bed-surface layer than to the river stream power.
实测资料表明，推移质输沙率与床面层内有效水流功率有良好的相关性，且高于推移质输沙率与水流功率的相关性。
Obviously armoring layer existed in the surface of the river bed.
河床表面具有明显的粗化层。
The functional requirements on surface layer of foundation bed for high-speed rail-ways are rather more strict than for ordinary railways.
和常规铁路相比，高速铁路对基床表层功能的要求更加严格。
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