A landslide and debris flow occurred in Yanjin, Zhaotong, Yunnan, killing 1 person and injuring four others. How did the debris flow happen?

Causes of Debris Flow The characteristics of debris flow and landslide are similar, and the causes are all caused by heavy precipitation. Of course, sometimes natural disasters and volcanic eruptions can also lead to crises, but most of them are due to the unstable physical structure caused by long-term rainstorm and temperature. Compared with landslides, the hazards of debris flow will be higher.

How much damage does debris flow do to towns?

The main hazards of debris flow are scouring urban areas, administrative institutions, manufacturing plants, coal mines and villages, causing human and animal casualties, damaging machinery and equipment of houses and other construction projects, and damaging crops, trees and agricultural land. In addition, mudslides sometimes block rivers, which not only isolates the shipping industry, but also may cause floods. There are many factors that destroy the tensile strength of debris flow, such as debris flow capacity, flow rate and velocity, among which the velocity of debris flow is more important to the degree of debris flow flooding. In addition, various human activities have intensified the role of this injury factor in various fields and promoted the formation of mudslides.

Debris flow often occurs in scenic spots and areas with frequent natural disasters and super volcanoes, and there are mass news during heavy rains. This is also the chicken liver stone that suddenly surges and erupts, and it is the most serious flood disaster in mountainous areas. Debris flow usually occurs in mountainous areas with arid climate or high-altitude glacier areas. The terrain here is very dangerous, with more deposits such as fine sand and stones and few trees. Once the rainstorm comes or the glacier thaws, large and small stones with abundant water will go down the slope, causing mudslides.

How to save yourself when encountering mudslides?

On the premise of finding a mudslide in the suburbs, you must escape at the first time, and you must wait until the mudslide approaches, which will lose a good escape time. Trees can effectively resist mudslides, but a few trees can't resist mudslides, which will also lead people not to be hit by trees, so we can try our best to escape to wooded forests or even bamboo seas. In addition, the forest can not only resist the debris flow, but also ensure that the soil layer under the tree is not washed down by the debris flow, so the direction of the forest is a better escape direction after encountering the debris flow.

Secondly, debris flows generally occur in areas with relaxed environmental conditions, especially on mountains without any trees, so we must flee to areas with difficult environmental conditions when we escape. In addition, mudslides generally rush to the bottom, so we are absolutely not allowed to escape in the direction of mudslides. On the contrary, it depends on whether there are places with weak landforms around where mudslides can't reach, so as to effectively protect themselves from mudslides.