China News Agency, Beijing, April 9th (Reporter Chen Su) In response to the frequent occurrence of fires in southwestern China's forest areas and the difficulty of fighting fires, the Executive Deputy Director of the Office of the National Forest and Grassland Fire Prevention and Fire Extinguishing Headquarters and the Fire Prevention and Management Department of the Emergency Management Department Chang Peng Xiaoguo explained the reasons to the outside world on the 9th.
At the press conference of the State Council ’s new office held on the same day, Peng Xiaoguo said that from a professional perspective, the occurrence and spread of forest fires are mainly affected by combustible materials, meteorological conditions and topography and other major factors. In view of the situation, the difficulties are mainly reflected in the following aspects.
One is that the weather is complicated. The southwestern forest area has a typical subtropical plateau monsoon climate with dry and hot valley climate characteristics. This season the relative humidity is lower than 20%. The monsoon, mountain wind and valley wind are intertwined, and turbulence occurs at any time. Sometimes the gust will reach 7 Level, level 8 or even higher level.
The second is the difficult terrain. The southwestern forest area is located in the Hengduan Mountains, spanning multiple geomorphic units, with steep mountain slopes, deep valleys, dense forests, and large terrain height differences. For example, the Ganzi Jiulong fire site has an average altitude of more than 3820 meters. This terrain restricts the vehicles and large mechanical equipment to drive to the fire site. The firefighters usually carry on foot for five or six hours to reach the fire site, and there are many fire spots on the cliff. On the cliff, the disposal is very difficult.
The third is difficult to expand in three dimensions. Affected by the terrain and water pressure of alpine valleys, it is often difficult to use water-extinguishing equipment. Due to the thin air in the plateau, the power and lift of the helicopter are reduced, and it is difficult to accurately spray the water on the fire line.
Fourth, it is difficult to reignite easily. Due to the complicated terrain and thick humus in the southwestern region, there are more combustible materials under the forest. "The fire disaster in the southwestern forest area is slamming. The tasks of cleaning and guarding are very heavy. Sometimes the fire is extinguished, but the sun is scorching Blow and smoke everywhere and catch fire everywhere. "
Peng Xiaoguo said that from the current fighting ability, there are also some shortcomings and restrictions, including equipment. The next step will be to strengthen monitoring and timely release early warning information to create conditions for early detection and early disposal; the national forest fire brigade and local professional fire fighting teams will moderately place high-risk dangerous areas and fire-prone areas in order to improve rapid disposal capabilities; strengthen equipment construction , Optimizing fire command communication; scientific rescue, ensure safety, strengthen risk research and judgment response, strengthen command coordination, and strictly control fire control. (Finish)