As aresult of fluvial scouring and aggrading the riverbed, the alluvial layer of circular-arclayered alluvial valleys is fluid-saturated porous medium.
由于河流的淤积和冲刷，沉积河谷场地的沉积层多为饱和土。
As aresult of fluvial scouring and aggrading the riverbed, the alluvial layer of circular-arclayered alluvial valleys is fluid-saturated porous medium.
由于河流的淤积和冲刷，沉积河谷场地的沉积层多为饱和土。
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