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甘肃是一个多山、多沙、多灾、水土流失严重、森林植被稀疏、生态条件差的省份。在全省国土面积中山(沙)区面积达90%以上,大部分地区年降水量在300mm 左右,最低不足40mm。全省荒漠化面积31.2万 km~2,占国土总面积的68.5%;水土流失总面积达38.9万 km~2,每年分别向黄河和长江输入泥沙5.18亿 t 和0.5亿 t,占黄河、长江流域年输沙总量的1/3和1/10。因此,甘肃林业生态建设不仅对本省社会经济可持续
Gansu is a province that is mountainous, sandy, disastrous, with serious soil erosion, sparse forest vegetation and poor ecological conditions. In the province’s land area of Zhongshan (sand) area of 90% or more, in most areas annual precipitation is about 300mm, the minimum less than 40mm. The desertification area in the province is 312,000 km 2, accounting for 68.5% of the total land area. The total area of soil erosion reaches 389,000 km 2. Sediment input into the Yellow River and the Yangtze River each year is 518 million tons and 50 million tons respectively, Annual sediment transport in the basin of 1/3 and 1/10. Therefore, the ecological construction of forestry in Gansu Province not only has a sustainable social and economic development in this province