Questioning to Liangzhou Fire 

1.Why is there a lightning strike in spring?

According to the relevant notification, the cause of the fire may be caused by lightning strikes.

 Zhang Mingying, an expert from the Beijing Meteorological Bureau, said that in the spring, the air is dry and the temperature rises, and the objective conditions are prone to hill fires. Lightning fire is a natural phenomenon that is difficult to prevent and control. In some places in China, spring thunder is called “dry thunderstorm”, because there is no rain when thundering. This kind of “dry thunderstorm” once hits the ground and hits the ground, it is easy to cause lightning. Lightning causes the burning of trees to spread very quickly. This "flying fire" can spread instantly under the influence of the mountain wind.

Zhang Jianshen, a professor at the College of Forestry, Fujian Agriculture and Forestry University, said that although there were lightning strikes in the summer, the water content in the southern part of the forest was relatively high due to frequent rainfall, which was not easy to cause fire.
2. What is the "detonation" of forest fires?
Zhang Mingying said that some ground vegetation is prone to rot after long-term accumulation, which in turn produces a large amount of flammable gas. At the same time, it is mixed with decaying combustibles, and the sudden fire of the open flame causes deflagration. In addition, in relatively closed terrain, the spread of forest fires causes the combustibles in these terrains to burn and then deflagrate in a relatively closed space.

According to Zhang Guofeng, the temperature at the time of "deflagration" is very high. Under the action of wind and terrain, it forms and happens very quickly. It is very difficult to escape once it happens. Deflagration is a typical extreme fire phenomenon in wildfires that has caused great damage to the ecosystem.

3. Why is the mountain fire dangerous and difficult to save?

Zhang Guoming said that forest fire fighting is a worldwide problem. At present, no country can effectively solve it. The difficulty lies mainly in its own characteristics. First, forest fires are different from ordinary fires, which burn in open systems. The second is mobile combustion, the factors affecting fire are constantly changing, and the burning, spreading and intensity are changing. In addition, meteorological conditions are constantly changing and the influencing factors are quite complex. Third, large-scale forest fires release energy instantaneously. The temperature is high and the combustion is severe, resulting in insufficient oxygen supply. Incomplete combustion can lead to the generation of toxic gases, which is very dangerous for firefighters. Fourth, it is difficult to control. When the fire becomes bigger, there are many unknowns and it is difficult to extinguish.

4. What are the high-tech fire fighting methods for forest fire protection?

Zhang National Defense introduced that at present, domestic forest fire prevention is mainly based on prevention and actively eliminated. In recent years, China has done a lot of work on forest fire protection. Taking exploration as an example, domestic-related work has even done better than developed countries. This includes the use of infrared fire detectors and satellite detection of forest fires. In addition, artificial rainfall and large fire fighting machinery are also frequently used in forest fire protection.

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