Characteristics of Runoff and Sediment on Karst Slopes Under Experiment Conditions of Simulated Rainfall
Simulated rainfall in laboratory was used to study the effects of various rainfall intensities (63 mm/h and 100 mm/h) on the processes of runoff and sediment erosion on slopping lands in karst area under plough.The results are as followings.First,with the same rainfall intensity,the steeper a slope land is,the greater the sediment yield is.Second,with the same slope conditions,the greater the rainfall intensity is,the faster surface runoff and underground pore flow generate water.Third,with the same slope conditions,runoff was interflow based on under different rainfall intensities,and there is the positive correlation between runoff and rainfall intensity.As for the runoff,interflow is the most while the surface flow is the least.The above findings can provide the theory for the revelation on the principle of slope land soil water erosion in southeast karst region and control for the rock desertification.
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