河流含沙量又称固体径流。指单位体积浑水中所含泥沙的数量，计量单位为千克/立方米。
穆教授以受到水土问题影响最大的黄河流域为例说，“黄河在历史上因为含沙量高于其它河流而因颜色而得名，但如今人类活动让黄河变得更黄了。”
"Historically, it got its name because of its colour - because the water contains more mud and sand than other rivers. But now it's yellower because of human activities, " he said.
穿过有大面积中生界和第三系地层出露地区的河流，其含沙量高，侵蚀模数大。
The rivers running across large area with emergence of Mesozoic and tertiary stratum usually have high sediment concentration and large modulus of erosion.
由于影响黄河含沙量的因素众多，预报技术难度大，至今没有可用的预报方案，可以说这在黄河上乃至其它河流都是空白。
Currently there is no available forecasting programme for the Yellow river or other rivers due to the complexity of factors influencing sediment concentration.
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