颗粒的干涉沉降
床层在松散期间大部分时问是与水流作相对运动，因而属于干涉沉降范畴。但这种干涉沉降速度是不稳定的，受床层松散度和水流速度影响时刻在变化着。但总的来说床层松散度不大，因此等降比将大大增加。

Particle interference

床层在松散期间大部分时问是与水流作相对运动，因而属于干涉沉降范畴。但这种干涉沉降速度是不稳定的，受床层松散度和水流速度影响时刻在变化着。但总的来说床层松散度不大，因此等降比将大大增加。

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.