A sudden flash flood occurred in Pengzhou. Witnesses: It only took 5 seconds to be washed away by the flash flood. Are there any signs before the flash flood occurs?

On August 13, 2022, a flash flood occurred in Longcaogou, Longmenshan Town, Pengzhou City, Sichuan Province, resulting in 7 deaths and two serious injuries. People who witnessed it said that they were hit by the flash flood in just 5 seconds. washed away. Before the flash flood occurred, the local area had received a weather forecast that there would be short-term heavy rainfall. Therefore, the government of Longmenshan Town also mobilized some organizational forces to persuade tourists to leave the river, but some tourists have not yet The flash flood suddenly broke out as soon as we left. So are there many signs before a flash flood occurs? In fact, when the water level of a stream rises rapidly or the water level of a west-flowing stream drops sharply, and the originally relatively clear stream suddenly becomes turbid, muddy water suddenly appears on the ground, and there are some unusual mountain sounds or muffled thunder in the mountains, it may be a flash flood. Sudden.

In fact, flash floods refer to sudden floods that occur in streams and ditches in some mountainous areas. The water flow is very concentrated and has strong erosion and destructive power. Flash floods are mainly caused by short-term heavy rainfall and continuous rainfall. This flash flood accident in Hangzhou City was also caused by a sudden short-term rainfall in the back mountains. There are also some signs before a flash flood occurs. First, the water level in the ravines and streams rises rapidly. This indicates that the large amount of precipitation in the upper reaches caused the flash flood. In other words, the water level of the stream suddenly dropped because the heavy rain caused the mountain to flood. The collapse caused the river channel to flow into the main stream and cut off the flow. Then when the water rushes through the blocked mountain, it will form a flood and rush down.

There are also some signs that the originally very clear streams suddenly become very turbid, which indicates that the heavy rains may have caused the mud, sand and rocks in the mountains to enter the water, thus forming a flash flood. , even said to be a mudslide. So if you just find that the water is very turbid, or there is sudden turbid water on the ground, you should start to be vigilant. In addition, there are some abnormal three people's livelihood or some sounds similar to the rumbling of a train, as well as muffled thunder, which all indicate the possibility of flash floods and mudslides.

Of course, the best way is to avoid going to areas where accidents often occur to avoid putting yourself in danger. The symptoms before the onset of a fever are generally difficult to detect, because it is easy to It is difficult to notice these small details, so it is difficult to judge whether there is a flash flood based on signs before the morning.