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岷江上游林区是成都平原的天然屏障。由于自然条件十分复杂。山高坡陡。河谷深切,森林的防护作用十分显著。建国后本林区进行大规模的采伐利用,采伐迹地逐年扩大。森林资源日趋枯竭。因而导致水土流失加剧,河川流量减少,生态条件恶化。为了改变这种现状,加速营造以水源涵养林和水土保持林为主的防护林工程体系的建设,实为当务之急。本
The upper reaches of the Minjiang River is the natural barrier of the Chengdu Plain. Due to the complexity of natural conditions. Steep mountain slope. Deep valley, the protective role of the forest is very significant. After the founding of the forest area for large-scale harvesting and utilization, logging expanded year by year. Forest resources are depleting. As a result, soil erosion has been aggravated, river flow has been reduced, and ecological conditions have deteriorated. In order to change this situation, it is imperative to speed up the construction of shelterbelt construction systems that mainly include water conservation forest and soil and water conservation forest. this