Factors Affecting Interflow of Gentle Hill in Jiangxi Province

Observed on bare slope,litter covered slope,vegetation covered slope at plots in Jiangxi province,the relationship between interflow's runoff,velocity,duration and precipitation and runoff factors was analysed by mathematical statistics methods.The result shows that: 1.Interflow in well covered slope is apparently larger than that of bare slope,and the former prolongs the the interflow duration;2.The interflow is positively related to rainfall,rainfall density,rainfall duration,mainly affected by precipitation at covered slope,and mainly affected by rainfall velocity at bare slpoe;3.The interflow duration is apparently related to rainfall factors on the surface level,and unapparently related in the bottom.The interflow duration is mostly affected by rainfall duration,and precipitation does least;4.The relationship between interflow velocity and factors affected by measures and the depth of soil,and the main affected factors shows same regularities.5.Interflow was unaparently related to the surface runoff at bare slope,and postitively related at covered slope,the increase amount at vegetation slope is larger than that of litter covered slope.