Debris flow has been observed to start its deposition at the front of the surge, with consequent piling up in ways of randomness. 野外观测和实验证明,泥石流的堆积是经过无数随机的“元堆积”叠加形成的。
The accumulation of large particles at the surge front and the permeation downwards into the un-saturated bed layer are the two important factors that promote the development of debris surge. 同时,运动过程中巨砾向龙头处集聚和泥石流体中液相介质向不饱和的床面堆积层的渗透流失,是促进龙头发展的二项重要因素。