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按现在的流失速度,50年后东北黑土区1400万亩耕地的黑土层将流失殆尽近期,各地泥石流灾害频发。8月18日,云南贡山普拉底乡村庄被泥石流夷为平地;8月12日至14日,泥石流重创四川汶川灾区;8月7日,甘肃舟曲特大山洪泥石流掩城……我国是世界上水土流失最为严重的国家之一。不但面积大、分布广,而且危害重,治理困难。2000年全国第二次遥感普查的结果显示,全国水土流失面积356万平方公里,占国土总面积的37%。
According to the present loss rate, 50 years later, the black soil layer of 14 million mu of arable land in the black soil area of northeast China will be depleted. Recently, mud-rock flow hazards have been frequent in various places. On August 18, villages in Pondichan, Gongshan, Yunnan Province were flattened with mudslides and mudflats; from August 12 to 14, the debris flow hit the Sichuan Wenchuan disaster-stricken areas; on August 7, the debris flow in Zhouqu, Gansu, One of the countries with the most serious soil erosion in the world. Not only large area, widely distributed, but also endanger heavy, governance difficulties. The results of the second national census conducted in 2000 show that the area of soil erosion in China is 3.56 million square kilometers, accounting for 37% of the total land area.