挟沙水流中的泥沙颗粒因水流紊动而悬浮，同时受重力作用而下沉。

Sediment particles is suspended in the sediment-laden flow because of the flow turbulence, and settle down due to gravity action.

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因上游来沙量增加，在最大浑浊带中心和河口拦门沙处悬浮泥沙浓度趋于增加。

The suspended sediment concentration at the center of the turbidity maximum zone and near the sand bar tends to increase because of the sediment addition from upstream.

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