泥石流阻力分析模型
（1）固液两相的划分模型：
式中，D0为在大悬浮颗粒粒径，大于D0的颗粒为固相的组成部分，小于D0的颗粒为液相的组成部分；
为固体颗粒容重；
为浆体容重；
为宾汉极限剪切力；K为系数。
（2）阻力计算模型;
1) 泥石流阻力
的模型：
式中，V为泥石流断面平均流速；R为水力半径；J为沟床比降；g为重力加速度。
2）清水阻力
模型：
式中，D95为河床质代表粒径；H为水深。
3）推移质运动造成的附加阻力Jp模型：
式中，S为推移质在床面上的覆盖率；α为固体颗粒水下休止角；
为推移质中值粒径。
祁龙：泥石流的阻力分析。水土保持通报，1989,9（6）
Debris flow refers to the mountainous or other valleys of deep valleys, terrain in steep areas, because of heavy rain, Blizzard or other natural disasters caused by landslides and carrying a large number of sediment and the special torrent of stones. Debris flow with a sudden and fast flow, flow, material capacity and destructive power and so on. Occurrence of debris flow often washed away highway and other transport facilities and even villages and towns, resulting in huge losses.
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