Why forest fires are particularly susceptible in autumn and east

Landlord It's not autumn and winter, it's December to June Because it doesn't rain in winter It's relatively dry Plus the autumn leaves cause the humus layer on the mountain to thicken Before the spring has entered the rainy season, the temperature of the wind rises In some places, the temperature reaches the ignition point and spontaneous combustion Where the temperature is not high, a little spark will cause a big mountain fire Often the fire is caused by just a cigarette butt The rainy season in previous years arrives in April But these years, global warming The season is unstable The rainy season is often postponed to after the Qingming Festival After the rainy season arrives, because the vegetation has been dried for half a year, it can't be watered through the humus layer at the beginning of the rain (usually about 1 meter thick, some deep mountains and old forests are taller than a person's height), as soon as there is a spark, it will catch fire again, usually around June, the fire will be less written.

The weather is dry, and the leaves are dead in autumn and winter.

There is little rain, the air is dry, and the temperature rises quickly.

The climate is dry in autumn and winter, and there are many combustibles such as branches and leaves. In the event of a fire, rangers will moderately burn the litter in the fall and winter to reduce the likelihood of a fire. In spring and autumn, due to the dryness and lack of rain in spring and autumn, coupled with the strong wind in spring and autumn in the Daxing'an Mountains, most of the forest species are conifers, and a few broad-leaved trees are extremely flammable.

Winter, dry winter is the season of fires. No rain is dry, and human negligence is the cause.

In the Middle West it is summer and autumn, especially in California. It is the Great Khing'an Mountains forest fires all year round, mainly in spring. The reason is that the snow in this area has melted in the spring, there is little precipitation, the wind is strong, the trees are dry, the temperature rises, and fires are prone to occur.

Another dangerous time is autumn, before the snowfall. In the north of our country, the fire prevention period is spring and autumn, and there is only one fire prevention period in the central and southwest regions of our country in spring, and in the northwest of our country, the annual fire prevention period is July 15 and September 15, and the key period is August.

The southeast coast of China has a long fire prevention period, and there is no obvious critical period for fire prevention. The main measures to prevent forest fires. Establish and improve forest fire prevention organizations.

The regulations on forest fire prevention stipulate that the forest fire prevention work shall implement the responsibility system of the people's administrative leadership at all levels, and organize relevant departments to set up forest fire prevention headquarters. Comprehensive management of forest fires. On the basis of the forest fire prevention regulations, we should focus on grasping the grassroots and the foundation, take specific measures as the breakthrough point, and thoroughly implement prevention.

Actively eliminate the forest fire prevention policy, and constantly reform and innovate. Establish a new forest fire prevention mechanism based on the grassroots, laying the foundation, fighting for the countryside and the village, preventing and governing the masses, and self-prevention and self-help. The main contents are as follows.

Strengthen publicity and education. Strengthen the management of outdoor fire sources and accelerate the construction of fire protection projects. Strengthen the construction of forest fire prevention teams.

Strengthen command and dispatch. Strengthen supervision and inspection. Post-treatment of forest fires.

When the temperature is high or the humidity is low. For example, mid-summer and the recent ongoing drought. High winds and autumn foliage are also important factors.

Forest fires are basically more frequent in the autumn season, because autumn is a season like autumn, the weather is very cool, this time is especially easy to catch fire, this time the wood is very dry, so it is particularly easy to catch fire.

The seasons when forest fires are more frequent are autumn, winter, and spring, because these seasons are the driest in climate. Especially in autumn and spring, when the weather is less rainy and dry, the incidence of forest fires is higher. If you count by date, then forest fires are most frequent from October to May.

Forest fires usually occur in winter, which is prone to forest fires because the winter climate is very dry.

Forest fires not only cause serious damage to forest resources, but also cause serious damage to the natural ecological environment of local economic and social development. After a forest fire, although the forest has the function of regeneration, it usually takes several years to decades to recover. However, many rare animals and plants are likely to be wiped out by fire.

First of all, repeated burning of forest fires will not only lead to changes in the composition of plant communities and make forests develop in the direction of xerophytic communities, but also cause the redistribution of other ecological factors, and forest fires will greatly reduce the role of forest soil and water conservation, water conservation, and climate regulation. It will also cause a large amount of energy stored in the forest to be released suddenly, destroy the forest ecosystem, and cause the chaos of biological and ecological factors in the forest ecosystem, which often takes decades or more to recover.

Secondly, once a forest is subject to fire, the most intuitive hazard is to burn or burn the trees. On the one hand, it has caused the decline of forest stock, and on the other hand, it has also seriously affected the growth of forests. Forests are renewable resources with long growth cycles, and it takes a long time for them to recover after fires.

Especially after high-intensity large-scale forest fires, it is difficult for forests to return to their original appearance, and they are often replaced by low-cost forests or shrublands. If it is repeatedly damaged by fire, it will become a barren grassland or even bare land. For example, in 1987, "after the catastrophic forest fires, the forests distributed in the steep slopes were basically turned into barren grass slopes after serious fires, and the ecological environment was seriously damaged, and it was almost impossible to restore the forests."

Thirdly, in addition to providing timber, the forest also contains abundant wild plant resources. However, forest fires can burn these precious wild plants, or change their habitat due to fire disturbances, significantly reducing their numbers and even extinct some species.

Finally, the forest is home to a variety of exotic animals. When a forest is caught in a fire, it destroys the environment in which wild animals depend for their survival, and sometimes even burns and injures wild animals directly. Due to the destruction of forests caused by fires and other reasons, many wild animal species in China have become extinct or endangered.

In the case of Australian bushfires, for example, mushrooms are the first to appear, a batch of mushrooms that grow on the corpses of plants to feed animals on scorched earth. Some eucalyptus trees that seem to have been burned into charcoal can germinate because their roots are not damaged, and those that cannot be burned can attract koalas and other animals to feed. Then, many herbs, shrubs, their seeds wait until the fire is released, and after the fire germinates, they become full of life with the help of precipitation because the ashes of the plants provide nutrients.

When a forest fire breaks out, it's pitch black, life, that is, there is no life, and after a few days it's nothing.

When a forest fire breaks out, a forest is burned to the point of only tree trunks, and after a few days, some trees may sprout and become green.

After the fire broke out in the forest, although after the fire raged, it was a mess. But nature recovers quickly, and after a heavy rain, the charred trees will sprout and continue to grow.

The reason for the occurrence of forest fires is that there are many combustibles in the forest, such as dead trees and fallen leaves, the climate is dry, the adjustment of the industrial structure of the forest area, the economic revitalization and the increase in the number of public vacation days, the number of people entering the forest area for construction, mining and other production activities and tourism has increased significantly, and the fire source has increased exponentially and the management is becoming more and more difficult.

Forest fire refers to the forest fire behavior that is out of human control, spreads and expands freely in the forest land, and brings certain harm and loss to the forest, forest ecosystem and human beings. Forest fire is a kind of natural disaster that is sudden, destructive, and difficult to deal with and rescue. The size of a forest fire is often measured by the area of forest affected, the area of forest affected and the number of trees.

1. There must be three conditions for the occurrence of forest fires: combustibles (including trees, grass and shrubs and other plants) are the material basis for forest fires; Fire danger weather is an important condition for fires; The source of fire is the leading factor in the occurrence of forest fires.

2. If one of the above three conditions is missing, the forest fire will not occur. A large number of facts show that forest fires can be prevented, combustibles and fire sources can be artificially controlled, and fire danger weather can also be predicted to prevent it.

3. Forest combustibles: All organic matter in the forest, such as Qiaoshouqiao bent trees, shrubs, bored grasses, mosses, lichens, litter, humus and peat, etc., are combustibles.

4. Fire source: the ignition temperature of combustibles in the same forest is different.

1. The occurrence of forest fires requires three conditions: combustibles (i.e., trees), fire danger weather and fire source. Without one of the three conditions, there will be no fire.

2. Among these three conditions, fire danger weather is one of the factors that cause forest fires. Thunder and lightning in weather with lightning and lightning**, or spontaneous combustion of trees in unusually dry weather, etc. General fire danger weather can be prevented by ** forecast.

3. The fire source is the key to preventing forest fires, because many times an inconspicuous move may bring a fire.

4. It is necessary to do a good job in forest fire prevention during the tomb worship on the Qingming Festival. When paying tribute to relatives, it is inevitable to order candles and burn paper, and under the large population base, the fire hazard is huge, so we should do a good job of prevention.

5. The cigarette butts of tourists are one of the important factors causing forest fires. Many tourists often throw away their cigarette butts after smoking, and the cigarette butts are still burning at that time, which is very easy to cause forest fires.

6. The aging of transmission lines in forest areas causes fires. The forest area is large, and the transmission lines that pass through it are long, and if the inspection is not carried out in time, it will directly cause forest fires.