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我国是世界上水土流失最为严重的国家之一。水土流失问题涉及到所有省、市、自治区。地处西北的黄土高原号称世界水土流失之最。60万平方公里的范围内,有水土流失面积40多万平方公里,年平均土壤侵蚀模数每平方公里3700吨。其中流失严重的15.6万平方公里,侵蚀模数高达5000吨以上,最高可达20000～30000吨。多年平均年输入黄河泥沙16亿吨。使黄河下游河床高出两侧地面4～10米,形成“千里悬河”,威胁着下游两岸一亿多人口生命财产的安全。
Our country is one of the countries with the most serious soil erosion in the world. Soil and water loss issues related to all provinces, municipalities and autonomous regions. The Loess Plateau, located in the northwest, is known as the most soil erosion in the world. Within an area of 600,000 square kilometers, there are more than 400,000 square kilometers of soil erosion area and an average annual soil erosion modulus of 3,700 tons per square kilometer. One of the most serious loss of 156,000 square kilometers, the erosion modulus up to 5,000 tons and above, up to 20,000 to 30,000 tons. The average annual input into the Yellow River sediment 1.6 billion tons. The lower reaches of the Yellow River higher than the ground on both sides of the ground 4 to 10 meters, the formation of “thousands of miles hanging river”, threatening the lives of more than 100 million people on both sides of the lives of the safety of the population.