2012•Unpublished venueRequires access
Study of Rainfall and Soil Erosion on Slope in Karst Region of Guizhou Province
Liu Yun-fang
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Abstract
In order to study the relationship between rainfall and soil erosion on slope in small watershed in Karst region of Guizhou,runoff plots which are located in the Longli County,Qiannan Prefecture,Guizhou Province were selected for experimental observation.The regression analysis method was used to analyze the correlation between rainfall(rainfall intensity) and sediment yield.Linear,polynomial relationship analysis indicated that the correlation between rainfall and runoff on slope was high,correlation coefficients were more than 0.5.At the 0.05 significance level,linear,polynomial significant examination showed rainfall was significantly correlated with sediment yield of 5 different planting patterns;and relation between rainfall intensity and sediment yield on slope was not obvious,the determination coefficient(R2) was about 0.1.In addition,this paper also discussed the other factors influencing erosion on the slope such as the canopy interception,infiltration and so on.