Design content and exquisite pictures of Tomb-Sweeping Day forest fire prevention manuscript

20 17 Tomb-Sweeping Day forest fire prevention manuscript design content and mito 0 1

20 17 Tomb-Sweeping Day forest fire prevention manuscript 02 design content and beautiful pictures.

20 17 Tomb-Sweeping Day forest fire prevention handwritten newspaper design content and beautiful pictures 03 forest fire prevention publicity materials

1, the harm of forest fire

Forest fire is the most dangerous enemy and the most terrible disaster in forestry, which will bring the greatest harm and devastating consequences to the forest. Forest fire will not only burn patches of forest, harm the animals in the forest, but also reduce the regeneration ability of the forest, cause soil impoverishment, destroy the function of forest to conserve water, and even lead to imbalance of ecological environment. Despite the rapid development of science in the world today, human beings have not made great progress in putting out forest fires.

2. Types and classification of forest fires

According to the burning position, spreading speed, damaged position and degree, forest fires can be roughly divided into three categories: 1. Surface fire II. Crown fire 3. Underground fire.

According to the affected forest area and casualties, forest fires are divided into general forest fires, large forest fires, major forest fires and particularly major forest fires.

① General forest fire: the affected forest area is less than 1 hectare or other woodlands are on fire, or more than 1 person but less than 3 people are killed, or more than 1 person is seriously injured and less than1person is seriously injured;

(2) Large forest fire: the affected forest area is more than 1 hectare and less than 100 hectare, or more than 3 people are killed and less than 10 people are seriously injured, or more than 10 people are seriously injured and less than 50 people are seriously injured;

(3) Major forest fire: the affected forest area is more than 1000 hectares but less than 1000 hectares, or more than 10 people are killed and less than 30 people are seriously injured, or more than 50 people are seriously injured and less than100 people are injured;

(4) Particularly serious forest fire: the affected forest area is more than 654.38+10,000 hectares, or more than 30 people are killed or more than 654.38+10,000 people are seriously injured;

3. Causes of forest fires

There are two main causes of forest fires: man-made fires and natural fires.

(1) Man-made fire includes the following contents:

Productive fire sources: fire for agriculture, forestry and animal husbandry, fire for forestry sideline production, fire for industrial and mining transportation production, etc.

Unproductive fire sources: such as outdoor smoking, cooking, burning paper, heating, etc.

Intentional arson: Among the fires caused by man-made fire sources, forest fires caused by land reclamation and smoking are the most. In the forest fires in our city, the fires caused by smoking, burning wasteland and burning paper on graves account for an absolute number.

② Natural fire: including lightning fire and spontaneous combustion. Forest fires caused by natural fires account for about 1% of the total forest fires in China.