黄土高原严重的土壤侵蚀闻名于世界。而说明其严重程度的具体侵蚀数据,一直是由水文站根据河水含沙量推算出的输沙模数表示的。水文站往往因控制流域面积较大,流域范围内不同地段的自然条件不同,侵蚀强度并不一样。这样的数据并不反映各地理单元土壤侵蚀的具体原因和过程,不利于深入研究黄土高原土壤侵蚀的机理,并据此提出相应的防治措施。本项研究试图借用航空立体测量的方法,通 Severe soil erosion in the Loess Plateau is famous in the world. Specific erosion data, which account for their severity, have been expressed by the sediment transport modulus calculated by hydrological stations based on river sediment concentration. Hydrological stations tend to have different erosion intensities due to their different natural conditions in different areas within the catchment due to their large controllable catchment area. Such data do not reflect the specific causes and processes of soil erosion in each geographic unit, which is not conducive to in-depth study of the mechanism of soil erosion in the Loess Plateau, and accordingly put forward corresponding prevention and control measures. This study attempts to borrow the method of aviation stereo measurement