过去由于我们对自然生态的忽视,常使森林遭到不应有的破坏,大片土壤裸露,江河泛滥和污染,使人类赖以生存的自然环境遭到破坏,自然生态失去平衡。几年来,佳木斯地区地下火时有发生,给人民的生命财产和国家森林资源造成很大损失。主要由于夏季降水量少、风大、蒸发量增加、空气中相对湿度小、地上易燃物干燥,一旦发生地表火时,很容易蔓延成地下 In the past, due to our neglect of the natural ecology, forests were often destroyed as they should be. Extensive exposure of the soil, river flooding and pollution destroyed the natural environment upon which mankind relied and the natural ecology was out of balance. In recent years, the underground fire in Jiamusi region has been happening for a long time, causing great losses to people’s lives, property and national forest resources. Mainly due to less precipitation in summer, the wind, evaporation increased, the relative humidity in the air, dry combustible ground, in the event of surface fire, it is easy to spread into the ground