The secondary disaster of the dammed lake is also the acoustic disaster

It is a secondary disaster, the dammed lake is a lake formed by the blockage of the mountain and the silting of the upstream water caused by landslides, debris flows or geological disasters such as **, and the dammed lake is easy to burst due to the dam body, causing harm to the downstream.

Wenchuan ** secondary disaster.

Yes Landslides, dammed lakes.

The lake is formed by the storage of water after the volcanic lava flow, moraine or the collapse of the mountain rock due to the collapse of the mountain and the landslide body of the sedan car.

1 The original water system.

2 The original water system is blocked by blockages. The blockage may be a volcanic lava flow, a landslide caused by ** activity and other reasons, a debris flow, or other materials.

Landslide. 3 When the valley and the riverbed are blocked, the waters gather together and overflow all around.

4 When water is stored to a certain extent, a dammed lake is formed. A dammed lake refers to a landslide body caused by ** and other reasons, and a lake formed by blocking the river valley or river bed and storing water. Once the dammed lake (Haizi) formed in the disaster area bursts, the consequences will be serious.

With the continuous occurrence of secondary disasters, the water level of the dammed lake (Haizi) may rise rapidly, and major flooding may occur at any time. Once the dammed lake (Haizi) bursts, it will form a flood peak downstream, which is no less destructive than the destructive power of the disaster. On May 12, 2008, Wenchuan, Sichuan Province was extraordinarily large, causing some areas of Beichuan to be flooded by the dammed lake, forming a large area of dammed lake.

Wenchuan, Sichuan, has caused 34 dammed lake danger zones. The Ministry of Water Resources of the People's Republic of China and the Sichuan Provincial Department of Water Resources have formed the Ministry of Water Resources for Earthquake Relief, and believe that the 33 dammed lakes formed by ** are not in danger at present. A "death squad" has been organized to monitor each dammed lake 24 hours a day, and if there are signs of dam failure, an early warning will be issued immediately and the people will be evacuated in time.

At present, 34 dammed lakes have been formed in the Sichuan earthquake area, which has brought a huge threat to the downstream areas. Dr. Xu Zeping of the Chinese Academy of Water Sciences, an expert involved in the earthquake relief at the Ministry of Water Resources, believes that the dammed lake is a naturally formed dam and is not a man-made structure. More than 90% of dammed lakes will burst or collapse within a year, but some have survived, such as the Duocai Lake in Sichuan.

Judging from the current dammed lake, the possibility of danger is very high due to the fact that the accumulation is very loose and unstable after the occurrence of **. Historically, some days can collapse. So at the moment, the first step is just to analyze and evaluate, use various methods such as aerial renderings, and then use data analysis to determine the degree of danger.

The second step is to divert the traffic, such as using explosives or manually digging small openings, and using pumps and pipes to divert them. The purpose of opening a small mouth is to ensure that it does not become a large mouth, otherwise the dam will collapse artificially. In addition, the dammed lake will be strengthened to avoid dam failure, and residents in the vicinity will be evacuated according to the situation.

For example, after **, because it became a ruin, the hygiene deteriorated, which led to the plague. Plague is a secondary disaster, and a secondary disaster is a new disaster that occurs indirectly due to a natural disaster

Regenerative disasters caused by disasters. For example, the disasters caused by ** itself are house collapses, landslides, etc., which will further cause floods, plagues, wars、、、 which are secondary disasters. ]

Many natural disasters, especially those of high grade and intensity, often lead to a series of other disasters occurring one after another, a phenomenon called disaster chain. The earliest occurring disaster in the disaster chain is called a primary disaster; Disasters induced by primary disasters are called secondary disasters.

Not necessarily, a dammed lake is a lake formed by a large area of rock collapse in the mountain due to various reasons, and the collapsed rocks pour into the river to block the normal flow of water in the original river, causing the water level of the river to rise. Landslides, mudslides, etc. can induce dammed lakes.

Yes. Due to the collapse of the mountain, blocking the river channel, making the river surface, there are heavy rains after the earthquake, and serious debris flow ...... will be formed

First of all, a dammed lake is a lake formed by the blockage of a river due to foreign material. This foreign material may have been brought by **, mudslides and landslides. It is not necessarily a natural disaster, and it is not a natural disaster when it does not affect human life and property.

** is a factor, and disasters such as landslides can also produce dammed lakes.

Suppose the disaster you are studying is **, then the dammed lake is his secondary disaster, caused by **.

Hazards: The blockages of dammed lakes are not fixed and unchanging, they can also be scoured, eroded, dissolved, collapsed, and so on. Once the blockage is broken, the lake overflows and pours down, creating a dangerous flood.

With the continuous occurrence of secondary disasters, the water level of the dammed lake may rise rapidly, which may lead to major flooding. Once the dammed lake formed in the disaster area bursts, the consequences will be serious. Once the dammed lake bursts, it will form a flood peak downstream, which is no less destructive than the destructive power of a disaster.

Risk classification: Generally, the degree of damage to dammed lakes is divided into the following five levels:

Basically intact: the load-bearing components of the building are intact, and some non-load-bearing components are damaged by light emblems. It does not need to be repaired and can continue to be used.

Minor damage: visible cracks in individual load-bearing components, obvious cracks in non-load-bearing components. No repairs or minor repairs are required to continue to be used.

Moderate damage: most of the load-bearing components have cracks, some components have obvious cracks, and some non-load-bearing components are seriously damaged and need general repair.

Serious damage: Most of the load-bearing components are seriously damaged, or there are partial collapses, which need to be overhauled, and individual buildings are difficult to repair.

Destruction: Most of the load-bearing components are severely damaged. The structure is on the verge of collapse or has collapsed, and there is no possibility of repair.

Dammed Lake yàn sè hú (weir: refers to a lower water-retaining structure. Saisè is used in written words, which means "to block".

English translation: barrier lake, dammed lake, quake lake (Barrier lake is recommended.) A dammed lake is a lake formed by a landslide that blocks a valley, a river valley or a riverbed due to volcanic lava flows, moraines or the collapse of rocks caused by ** activities.

Lakes formed by the interception of volcanic lava flows are also known as lava dam lakes.

The dammed lake is formed by the silting up of the river channel by the landslide on the mountain, so that the water upstream accumulates, and if the dam fails, the downstream city may be submerged. The harm is great.