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研究细沟流速特征是对细沟侵蚀发育机理探讨的必要方面,通过不同雨强(1.5,2.0,1.0mm/min)连续室内纯净水人工模拟降雨试验,分析不同坡度(10°,15°,20°,25°)、不同坡长(5,10m)条件下细沟流速随细沟发育的变化特征。结果表明,坡面发生细沟侵蚀且再降雨小于前降雨强度的条件下,细沟流速随时间变化的差异极小,可以利用坡面平均细沟流速进行此阶段的相关研究分析;相同降雨条件下,坡长对细沟流速的影响不显著,细沟流速与细沟流路之间的关系应作为进一步研究对象;细沟流速与坡度呈负相关关系,随着降雨进行,细沟的发育,相关程度逐渐增大。
Studying the characteristics of rill flow velocity is a necessary aspect to explore the development mechanism of rill erosion. Through artificial simulated rainfall experiments of pure indoor continuous water with different rainfall intensity (1.5,2.0,1.0mm / min), the effects of different slope (10 °, 15 °, 20 °, 25 °) and different slope length (5 and 10 m). The results show that under the conditions of rill erosion on the slope and the re-rainfall less than the previous rainfall intensity, the difference of the rill flow velocity with time is extremely small. Based on the analysis of the mean rill flow rate at this stage, The slope length has no significant effect on the flow velocity of the rill, and the relationship between the rill flow velocity and the flow path of the rill should be taken as the further study object. The rill flow velocity and the slope degree have a negative correlation, and as the rainfall progresses, the development of the rill , The degree of correlation gradually increased.