答暴雨时山洪暴发，泥石洪水混在一起的液固两相流，突然发作，流速可每秒高达十几米，汹涌而下，破坏力很大，常造成毁灭性灾害，这种现象叫做泥石流，是水土流失一种特殊形式。全世界有60多个国家和地区、我国有26个省市区有泥石流侵蚀危害。泥石流不同于一般挟沙水流待征，? A rainstorm flash floods, mud-rock flood mixed liquid-solid two-phase flow, a sudden attack, the flow rate can be as high as ten meters per second, surging down, destructive power, often causing devastating disasters, this phenomenon is called debris flow, Is a special form of soil and water loss. There are more than 60 countries and regions in the world, and 26 provinces, cities and districts in our country have the erosion hazard of debris flow. Debris flow is different from the general sediment-laden flow to be levied,?