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顆粒的干涉沉降
床層在松散期間大部分時問是與水流作相對運動，因而屬于干涉沉降范疇。但這種干涉沉降速度是不穩定的，受床層松散度和水流速度影響時刻在變化著。但總的來說床層松散度不大，因此等降比將大大增加。

Particle interference

床層在松散期間大部分時問是與水流作相對運動，因而屬于干涉沉降范疇。但這種干涉沉降速度是不穩定的，受床層松散度和水流速度影響時刻在變化著。但總的來說床層松散度不大，因此等降比將大大增加。

In the loose period, the bed level is related to the water flow, which belongs to the category of the interference. But the velocity of the interference is unstable, and the influence of the velocity of the bed and the velocity of the flow is changing. But in general, the bed layer is loose and the dispersion is not large, so it will be greatly increased.