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人类社会发展历史证明,地球上除地震、飓风及雷火灾害与地壳和大气环流运动有关,现阶段仍是人力不可抗拒的自然灾害以外,其余种种自然灾害,均与人类无休无止地大规模采伐破坏森林植被有着直接关系,破坏程度愈烈,灾害程度愈甚。尤其是旱涝灾害,更是与森林植被破坏的程度息息相关。汉中地域森林植被长期大规模采伐破坏的
The history of the development of human society proves that all kinds of natural disasters besides earthquakes, hurricanes and thunderstroke disasters that are related to crustal and atmospheric circulation movements and are still irresistible to mankind at this stage are all on an endless scale with mankind Harvesting destruction of forest vegetation has a direct relationship, the more the extent of damage, the more serious the disaster. In particular, droughts and floods are closely related to the degree of destruction of forest vegetation. Hanzhong area forest vegetation long-term large-scale logging damage