Most desert streambeds are normally dry, but they occasionally receive large flows of water and sediment.

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。

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All of these indicate that in the arid desert area the drainage system sediment survey, as a rapid reconnaissance for a big area, is the one of more effective methods for uranium prospecting.

从而说明，在干旱荒漠地区进行水系沉积物测量，快速扫面，是普查找矿远景行之有效的方法之一。

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The relationship of sediment content and antecedent soil moisture showed the parabolic trend. In desert grassland, the soil moisture is 17.5% in the early time of surface soil loss.

径流含沙量与土壤前期水分之间的关系呈近似一元二次方程抛物线变化，荒漠草原坡面土壤流失最少的前期最优土壤含水量值为17.5%。

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