本文通过分析黄河水沙变化特性，探讨了河床沉积与形态调整的变化。
In this paper, the characteristics of the flow-sediment variation and the corresponding adjustment of riverbed shape are studied based on the observation data.
科学家们已经确定，在埃塞俄比亚阿法尔地区干燥河床的细颗粒沉积物中发现的具有锋利边缘的石片存在于252万至260万年前。
Scientists have dated sharp-edged flakes of stone found in the fine-grained sediments of a dry riverbed in the Afar region of Ethiopia to between 2.52 and 2.60 million years ago.
大多数沙漠河床通常是干燥的，但它们偶尔也会有大量的水流和沉积物。
Most desert streambeds are normally dry, but they occasionally receive large flows of water and sediment.
由于河流冲刷和河床加积，沉积层多饱和多孔。
As a result of fluvial scouring and aggrading the riverbed, the alluvial layer is fluid-saturated porous medium.
河床内部的灰色和白色物质显示出是沉积物和盐结层。
Gray and white materials within the lake bed are exposed sediments and salt crusts.
遍地黄沙的荒漠，干涸的河床与湖床中的沉积物——在伊拉克，这些沙尘源地的存在，为沙尘暴的发展壮大提供了极佳的条件。
Sandy deserts, impermanent lakes, and riverbed sediments provide plentiful material for dust storms in Iraq.
土壤微粒沉积在自己的河床上，使河流变浅。
Particles of soil are deposited on the riverbed itself, making the river shallower.
河流携带的部分粗砂砾在河床上形成滞留沉积。
Some coarse gravel loaded by the river deposited in the river channel.
由于泥沙的沉积，河床抬升，水深变小，水流速度场在整个堆积扇上明显增大，并在三角洲前缘出现明显的绕岛环流和河流分叉现象。
The water depth reduced due to deposition, the water flow velocity upon the alluvial sector increased obviously and at the front of the delta exists currents around the sand bar.
河床-河漫滩型和谷底洼地型泥炭沉积物中总氮和总磷含量随着泥炭粒级的减小而明显增加。
With decreasing of peat granule size, the content of TN and TP was increasing obviously in peat sediment of river bed-flood land and valley depression land.
河床-河漫滩型和谷底洼地型泥炭沉积物中总氮和总磷含量随着泥炭粒级的减小而明显增加。
With decreasing of peat granule size, the content of TN and TP was increasing obviously in peat sediment of river bed-flood land and valley depression land.
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