从黄河小浪底建设管理局获悉 ,自 1999年 10月下闸蓄水以来 ,小浪底水库已拦泥沙约 9× 10 8ｔ,大大缓解了黄河下游河道的淤积。黄河为害 ,根在泥沙。黄河年均高达 16× 10 8ｔ的输沙量使下游河道平均每年提高 10ｃｍ ,形成了“地下悬河”的世界奇观。新中国成立后 ,三次加高加 According to the Xiaolangdi Construction Management Bureau of the Yellow River, Xiaolangdi Reservoir has suspended sediment by about 9 × 10 8 tons since the sluice gate closed in October 1999, which greatly eased the siltation of the lower Yellow River. Yellow damage, roots in the sediment. The annual sediment discharge of the Yellow River, with an annual average of 16 × 10 8 tons, has increased the average annual downstream river channel by 10 cm, forming a wonders of the world. After the founding of New China, he added Canada three times