Abstract:Six plots(grass slope,grass-cut slope,plowed grass slope,shrubby slope,shrub-cut slope,and plowed shrubby slope) in the Yan'gou watershed were constructed and infiltration data for thirty simulated rainfall events were analyzed.Results showed that the average infiltration rate on vegetable slope was 1.2 times greater than that on shrub-cut slope and 2.0 times greater than that on plowed slope.For the soil bulk density of 1.27 or 0.99 g/cm3 on grass slope or shrubby slope,the average infiltration rate varied with rainfall intensity as a parabolic function at a slope of 7 degree.When rainfall intensities for grass slope,grass-cut slope,shrubby slope,and shrub-cut slope were 1.62,2.21,2.49,and 1.71mm/mim,the maximum averaged infiltration rates were 1.17,0.97,1.67,and 1.51mm/min,respectively.In contrast,when rainfall intensities for plowed grass slope and plowed shrubby slope were 1.36 and 1.68mm/min,the minimum averaged infiltration rates were 0.379 and 0.382mm/min,respectively.In conclusion,the Horton's model better simulates the infiltration process under the condition of the different land uses.