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甘肃省水土流失面积 3 8 62万km2 ,占总土地面积的 85 0 7%。其中 ,黄河流域水土流失面积 11 11万km2 ,占省内黄河流域总土地面积 14 8万km2 的 75 %。截至 2 0 0 2年底 ,全省共建成骨干坝 2 3 1座 ,同时修建了大量的中、小型淤地坝。淤地坝在减少入黄泥沙 ,改善干旱、半干旱地区水资源缺乏状况 ,改善山区交通条件 ,巩固和扩大退耕还林 (草 )成果等方面发挥了重要作用。介绍了甘肃省淤地坝建设的主要经验和前景。
Soil erosion in Gansu Province is 38.22 million km2, accounting for 85.07% of the total land area. Among them, the area of soil erosion in the Yellow River Basin is 11,110,000 km2, accounting for 75% of the total land area of 148,000 km2 in the Yellow River Basin in the province. By the end of 2002, a total of 21 3 key dams have been built in the province, and a large number of medium and small silt dams have been constructed. Warping dams have played an important role in reducing the sediment into the Yellow River, improving water shortage in arid and semi-arid areas, improving the traffic conditions in mountainous areas and consolidating and expanding the achievements of returning farmland to forests and grasslands. The main experiences and prospects of the construction of check dam in Gansu Province are introduced.