Today let's get right to the point and talk directly about the forest fires, in the past few days like everyone else I've been focusing on this matter, and now it's a stage of victory, but we also see that this fire, took away so many lives. The cost is really too heavy. Every one of them is a young life, every one of them is a son, some of them are fathers, and every one of them has a big family behind them. It's too much to bear.
I just hope the rest of the year is better.
This forest fire also makes us realize how destructive and catastrophic he is.
Today we will briefly talk about why forest fires are difficult to extinguish, what are the ways to deal with them, and whether they can be prevented by technological means.
Forest fires are difficult to extinguish mainly because they are large and widespread, they burn a large area and spread quickly.
Because some forest trees are rich in grease, a lot of this will accumulate on the trunks over time, and these are combustible. The forest is full of dead trees, branches and weeds, all of which are very flammable.
Together with the wind, the fire will soon expand. During the dry season, mountainous areas are prone to significant updrafts, which make it very likely that a deflagration will occur. If your fire is at the bottom of a hill, with the help of this updraft, especially on steep slopes, the fire will quickly climb to the top. If the fire itself is at the top of the mountain, coupled with the various eddies and transmountain air currents, the wind direction will change abruptly, easily causing flying fires, it may be scattered in the valley or the mountainside, then with the help of the upward air currents just mentioned, the fire will climb up again. It would then link up the whole fire. So it's hard to deal with. Coupled with the mountain forest inside some rotten branches, rotten leaves, rotting for a long time, he will produce combustible gas, like our old home behind the pit, he will produce this methane gas. This combustible gas will be fueled again.
So the fire in the mountains, full of too many uncertainties, now we just extinguished the open fire, the next most important thing is to prevent it from rekindling.
Besides this, there is also the factor of terrain. Mountainous areas are basically rugged roads, transportation is not convenient, in order to Liangshan see, this area is more than 4000 meters above sea level peaks, there are 20, this altitude has begun to produce a high reflex plus mountainous terrain, it is a great restriction on the activities of firefighters. Not to mention the large fire-fighting equipment. There is no way to transport them to the scene. On the other hand, it also restricts a lot of means of extinguishing fires, such as digging isolation zones.
So you see how complex and dangerous the environment is for firefighters, let's talk about how to deal with it.
For the gully terrain, in principle, with the tail and flanks of the fire to fight the fire. In the process of fighting the fire, to burn a safe area in the less wooded places, as an emergency shelter use. It is also important to prevent an observation post, so that if a new fire is found to be forming, it should be quickly evacuated.
This is from a tactical point of view, on the other hand, or to work on the hardware, from direct fire fighting to indirect fire fighting change, from manual fire fighting to scientific and technological fire fighting change, as far as possible, is on the equipment, the people replaced.
The fire used about seven helicopters, such as Mi-17, Mi-26, Ka-32 helicopters, to carry water from a distance to extinguish the fire. In addition, drones were used to monitor the fire.
Then we all know. Prevention is more important than anything else.
If the warning is early, a fire can be detected in its infancy and he can be eliminated at little cost.
For example, drones and satellites can be used for early warning. And now our country has built a set of satellite-based remote sensing forest wildfire assessment and early warning system.
Just hope that such a thing, in the future will not happen, I see the cause of the analysis, at present do not rule out because of ancestor worship caused by the fire. No matter what, no matter in what kind of environment, there must be a certain sense of crisis, sometimes make a little mistake, is to pay a big price.