【摘要】 通过 1∶2 5万赤布张错幅地质调查 ,发现长江源区植被退化和水土流失极为严重 ,对造成这一环境的主要地质因素 :青藏高原隆升、冰川退缩和冻融作用一一进行了分析 ,并对其环境演化趋势进行了探讨 ,指出改善长江源环境的关键是加强保护及生态重建。更多还原

【Abstract】 During geological survey in the source region in the Yangtze River, the author recognized that the vegetation degeneration and soil erosion are related to geologic agents such as uplifting of the Qinghai Tibet plateau, shrinking and thawing of the glacier. The authors concluded In this paper that strengthening protection and reconstructing of the ecosystem are the key to improving the environment of the source region in the Yangtze River, the trend of environmental evolution in the source region in the Yangtze River has been discussed, and更多还原