论文部分内容阅读
结合作者提出的坡面发育自组织模型 ,本文对典型坡度条件下坡面的发育过程进行了模拟 ,并重点分析了面蚀与沟蚀在坡面侵蚀中的关系 ,尤其是关于面蚀和沟蚀贡献大小的转化机理这样一些过去无法预测的方面 .结果表明 ,面蚀与沟蚀在侵蚀机理上有本质的区别 .当坡度小于 2 0°时 ,面蚀在总体侵蚀中所占的比例随坡度的增大而迅速减小 ;当坡度大于 2 0°时 ,其减小速度随坡度的继续增加则明显变缓 .由面蚀为主向沟蚀为主的转化过程之快慢 ,在土壤及降雨等条件一定时与坡面的坡度关系很大 . 15°以下的缓坡面蚀向沟蚀转化的时刻远远滞后于 2 0°以上的陡坡 .这种差异可能是由于陡坡发育过程中坡面破碎程度远远高于缓坡所造成的
Combined with the self-organizing model of slope development proposed by the authors, this paper simulates the development of the slope under typical slope conditions and focuses on the relationship between surface erosion and gully erosion on slope erosion, especially on the surface erosion and ditch Etc .. The results show that there is an essential difference between erosion and gully erosion in the erosion mechanism.When the slope is less than 20 °, the proportion of surface erosion in the overall erosion decreases with When the slope is greater than 20 °, the decreasing speed decreases obviously with the increase of the slope.From the aspect of gully erosion, Rainfall and other conditions must have a great relationship with the gradient of the slope.The transition from gentle slope erosion to gully erosion far below 15 ° lags far behind the steep slope above 20 ° .The difference may be due to the slope Broken degree is much higher than the gentle slope caused