Study on dynamic mechanism of rills, shallow furrows and gully in the soil erosion chain

Based on the simulated rainfall experiments,the relationships between the velocity-discharge,depth of runoff-discharge,the velocity-the depth,resistance coefficient with the Reynolds number in rill runoff are established systematically studied; the effects of rain intensity and slope on hydraulic feature,the erosion characteristics of various runoff types and runoff fluidization states and hydro-power elements,and the hydro-driving characteristics and erosion processes in shallow furrow and gully are researched preliminarily.The results are very important to explain the dynamic mechanism of sediment-water flow under various types of gully erosion in erosion chain and occurrence and evolution of soil erosion chain.