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选择该地区水土流失主要动力条件降雨因素为切入点,通过人工模拟降雨试验对紫色土坡地降雨侵蚀特征及规律进行研究.结果表明:(1)降雨量与径流量、侵蚀量呈显著线性正相关,降雨量变化显著地影响径流总量和侵蚀总量的变化;降雨强度与径流量、侵蚀量之间也存在显著正相关,但相关程度较前者略小;(2)侵蚀量与时段最大降雨强度、平均雨强之间的相关程度差异很大,主要原因在于平均降雨强度概化了降雨侵蚀机制和侵蚀过程;(3)径流量和侵蚀量之间符合平方关系和幂函数关系,回归方程达极显著水平;(4)在高(中)强度降雨过程中,径流量和侵蚀量随降雨过程呈幂函数正相关变化,而低强度降雨过程中,径流量和侵蚀量随降雨过程呈线性负相关变化.
By selecting rainfall factors as the main dynamic conditions of soil and water loss in this area, the rainfall erosion characteristics and laws of purple soil slope were studied by artificial simulated rainfall test.The results showed that: (1) There was a significant linear positive correlation between rainfall and runoff and erosion , The change of rainfall significantly affected the change of total runoff and total erosion; there was also a significant positive correlation between rainfall intensity and runoff and erosion, but the correlation degree was slightly less than the former; (2) The main reason is that the average rainfall intensity can be used to generalize the rainfall erosion mechanism and erosion process. (3) The relationship between runoff and erosion is in the square relationship and power function, and the regression equation (4) In the process of high (medium) intensity rainfall, the runoff and erosion amount had a positive correlation with the rainfall power function. In the process of low intensity rainfall, the runoff and erosion amount were linear with the rainfall Negative correlation change.