最后，给出了小浪底水库异重流单宽输沙率公式，并得到其它水库资料验证。
Finally the formula of unit sediment rate of density flow in Xiaolangdi reservoir has been pointed out and the data of other reservoirs has been verified.
采用图像处理的数字掩码技术，处理图像得到了沙粒在流场中的面密度以及单宽输沙率。
Based on the digital mask technique, the distribution of sand area density and the sediment-transport rate in flow field were obtained.
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