选择南水北调水源区典型小流域，在坡耕地、经果林、退化矮林、荒草地和马尾松林 5 种土地利用类型上建立径流小区，观测不同土地利用类型产流产沙规律及其受不同坡度的影响。研究结果初步表明：高强度、短历时降雨过程是南水北调中线水源区水土流失的主要动力；在 5 种土地利用类型中，经果林和坡耕地产流产沙量最大，因此，除了加强坡耕地治理外，控制经果林水土流失也是南水北调中线水源区植被恢复的重点。

 The typical small watershed in the water source area of the Middle Route of South-to-North Water Transfer Project was chosen to build runoff plots on five different land use types with slope farmland, horticulture, degradation coppice, wildgrassground,and masson pinus.The rules of runoff and sediment generation under different land use types as well as the effect of slopes were observed. The research results showed preliminary that the rainfall process with high intensity and short duration was the main force inducing soil and water loss in the water source area. Among the five different land use types, the runoff and sediment of horticulture and slope farmland were significantly higher than those of the other types. Therfore, besides enforcing the slope farmland management,controlling the soil and water loss of horticulture is also important for the vegetation recovery in the water source area of Middle Route of South-to-North Water Transfer Project.