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我省位居黄河中游,水土流失面积10.8万平方公里,占全省总面积的69.1%。年平均输沙量约4.5亿吨,泥沙主要来自晋西28个县的黄土山区。全区自北向南可分为风沙缓坡、黄土丘陵沟壑和残塬沟壑三种类型区,总面积4.62万平方公里,约占全省总面积的30%。年平均输沙量为2.9亿吨,占全省输沙量的64.4%,年平均输沙模数达6,300吨/公里~2。严重的水
The province is located in the middle reaches of the Yellow River, soil erosion area of 108000 square kilometers, accounting for 69.1% of the total area of the province. The average annual sediment transport is about 450 million tons, silt mainly from the loess mountains in 28 counties in western Shanxi. The whole region from north to south can be divided into wind and gentle slope, loess hilly and residual gully three types of area, with a total area of 46200 square kilometers, accounting for about 30% of the total area of the province. The average annual sediment transport is 290 million tons, accounting for 64.4% of the total sediment discharge in the province, with an average annual sediment transport modulus of 6,300 tons / km ~ 2. Serious water