我国是世界上水土流失最严重的国家之一,据国家1992年11月发布的全国应用遥感技术普查,全国总计水土流失面积达367,02万km~2,其中水蚀面积达179.42万km~2,风蚀面积187.60万km~2。全国约有4亿人口直接受到水土流失的危害。因此,保护、改良与合理利用我国水土资源,作好水土保 China is one of the countries with the most serious soil erosion in the world. According to the national survey of applied remote sensing technology released in November 1992, the total area of ​​soil and water loss in China is 3.672 million km2, of which the water erosion area reaches 1.7942 million km2 , Wind erosion area of ​​18760000 km ~ 2. Some 400 million people across the country are directly endangered by water and soil loss. Therefore, we should protect, improve and make rational use of water and soil resources in our country so as to make better soil and water conservation