Valley areas.
Fire fighting personnel in the valley area of mountain fire, we should pay attention to the first is the fire produced by the flying fire easy to ignite the nearby mountain field, surrounded by fire fighting personnel;Second, when the fire burns, a large amount of oxygen is consumed, so that the oxygen content of the air at the bottom of the valley drops, so that the fire extinguisher suffocates to death.
Canyon area.
When the wind blows along the length of a valley and the width of the valley varies from place to place, the wind speed increases at the narrow point. This is called canyon wind, or canyon effect.The fire was burning in the canyon, and it was so fast that it was dangerous to fight it in the canyon.
Trench zone.
If the main ditch on the fire hill is burning, the fire will be diverted when it encounters a branch.The branch in the burning, but not easy to the main ditch direction of development, therefore, if the main ditch fire, fire fighting personnel from the main ditch to the main ditch movement is not safe.
Saddle field zone.
When the wind crosses the saddle field of a mountain ridge (that is, the distance between the two mountain ridges and the height of the valley and the mountain ridge is not far apart), it tends to form horizontal and vertical cyclones, which can cause damage to firefighters.
A mountain range that rises in succession.When there are successively higher mountains in front of the fire, the fire develops rapidly in front, and several mountains will be burned all at once. It is not safe to build fire lines on the ridges in front of the fire.
Post time: Mar-03-2021