The whole process of water and sediment in watershed consist of water generation and concentration, sediment erosion, transportation and deposition.

全流域的水沙过程包括降雨产流、汇流的全过程，以及泥沙侵蚀、输移、沉积的不同运动形态。

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This double threshold phenomenon plays an important role in sediment transportation of heavily sediment laden rivers.

水沙两相流冲淤的双临界现象，对于多沙河流河道泥沙的输移有重要意义。

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Some successful examples were given to illustrate the effects of different pumping sites along the irrigation canals on sediment utilization, treatment and transportation.

并例举了渠道不同部位设置提水设施对于引黄灌区泥沙利用、理和输送等方面的作用和效果。

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