What is the difference between a landslide and a debris flow? Which is more dangerous? What are the signs before it happens? Friends who live in the mountains must pay attention!
In recent days, the southern coastal areas of the mainland are preparing for Typhoon Du Surui, and the impact of this typhoon on the mainland will be very large, and friends in inland provinces should also be prepared for disaster prevention. Especially friends who live in the mountains, heavy rainfall brought by typhoons may cause landslides and mudslides, let's take a look at these two natural disasters.
What is the difference between a landslide and a debris flow?
The principle of occurrence of the two is different, landslide refers to the downward sliding of soil and rock layers under the influence of gravity under the action of flash floods, heavy rainfall, and earthquakes. Before the shelving, landslides were called "walking mountains" and "collapsing mountains".
Debris flows are the action of heavy rainfall, the mud, dead wood, and stones on the surface of the mountain are mixed into the flash flood, forming a semi-solid mud fluid, which can bury everything everywhere it goes. In ancient times, mudslides were also called "out of the dragon" and "walking jiao".
Which of the two natural disasters is more dangerous?
In terms of time, landslides come more urgently, the destructive force is greater than mudslides, many times there is no time to react, houses and people are buried in the mud, and large-scale landslides can bury entire villages.
Debris flow eruptions are usually accompanied by flash floods, and torrents mixed with mud and dead wood flow more slowly, and if they flow down steep mountains, the speed is comparable to landslides. Landslides are less powerful than landslides, but they are generally more widespread than landslides, which is understandable, and mudslides are more mobile than landslides.
In the news, we can see that mudslides and landslides often occur together. In fact, extraordinarily large debris flows must be accompanied by landslides, and the mud and stones that slide down the mountain are combined with floods in mountain rivers, and super-large debris flows are formed.
In February, Peru experienced a massive mudslide that killed more than 40 people and left more than a dozen missing.
What are the signs of mudslides and landslides before they occur?
Let's start with landslides, which can make noises before they happen. Some stones fall from the mountain and hit the ground at the foot of the mountain, or fall into the river, making sounds, hearing these sounds, quickly observe the surrounding mountains and prepare for escape.
Push the time a little further, from the terrain before the landslide occurs, there will be a looming dividing line between the slippery part and the main body of the mountain, which looks very abrupt, and you can even see obvious cracks between this part of the mountain. And this crack is constantly growing, which is a typical landslide omen. In the event of such a sign, the occupants of the mountain should evacuate urgently, and if it is a roadside, then the road should be blocked and no vehicles should pass.
Before the mountain is about to landslide, the spring water of this part of the mountain will be abnormal, and a large number of mountain springs will suddenly gush out where there was no spring in the past, and the springs in the past will suddenly dry up.
When the mountain is about to slide, the cats, dogs, chickens and ducks at home will show restlessness, the mice will not hide in the hole, drag the family out with their mouths, and the toads on the ground will jump everywhere, which indicates that disaster is coming. Although the intelligence of animals is not as high as that of humans, their ability to perceive dangers in nature is much stronger than ours.
Mudslides are easier to observe than landslides, and heavy rainfall is required first to cause flash floods. Secondly, the soil on the mountain should be loose so that it will be washed down by rain, both of which can be observed in advance. Before a mudslide occurs, yellow water spreads to the road surface, and this water mixed with fine sediment is easy to distinguish. When you see this water, you have to run quickly, there will be flash floods and mudslides 100% behind.
In addition to heavy rainfall, melting ice and snow can also lead to mudslides, which occur in the Qinghai-Tibet Plateau on the mainland, and friends who like to travel by car must pay attention to the nearby rivers and mountains.
How can we protect ourselves from landslides and mudslides?
The most important thing is to judge the direction of landslides and mudslides, and run away if you judge the right direction. When a landslide occurs, you cannot run in the direction of the mountain slide, but run to both sides. Also, don't think about finding a place to hide, the landslide has nothing to stop it, you can only survive by running out of the landslide.
After the occurrence of a mudslide, you must not run downstream, you must run to the high places on both sides of the mudslide, when encountering a mudslide, it is the same as avoiding floods, do not stay in a low-lying place, so it is easy to be buried by muddy water.
In the event of a natural disaster, human life comes first, don't think about your family's property, the first thing to do is survive. In the past, tragedies often occurred, when natural disasters struck, some people ran to their homes to get cash and passbooks, and finally confessed themselves. People have nowhere to spend when they have no money, especially some elderly people are prone to make such mistakes.
If you have friends and family who live in the mountains, you can forward this video to them after watching it. Due to the impact of the typhoon, there will definitely be many natural disasters in the next two months, so everyone must be prepared.