山东省的水土流失危害主要有:增大河流的洪枯比,土壤肥力降低、质地变粗,土层变薄,基岩裸露,库坝河湖严重淤积,洪涝风雹等自然灾害频繁等,加重了居民的贫困。小流域治理,减轻了水土流失,提高了生态经济效益;提高了土壤肥力,增加了农地的产量;发展了商品生产,提高了综合经济效益。 The main causes of soil erosion in Shandong Province are as follows: increasing the flood-water ratio of the river, reducing the soil fertility, thickening the texture, thinning of the soil layer, exposing the bedrock, serious deposition of river banks and reservoirs, frequent natural disasters such as flood and hail, Increased the population’s poverty. Small watershed management, reduce soil erosion, improve ecological and economic benefits; improve soil fertility and increase the yield of agricultural land; development of commodity production, improve the overall economic efficiency.