中国黄土地区耕作侵蚀模拟(英文)

耕作侵蚀是国际上新近开展的一个研究领域。为了对中国黄土地区的耕作侵蚀规律进行定量描述 ,采用施放小立方块作为示踪材料进行耕作试验及测量来示踪和监测土壤运动 ,并通过相关分析与理论推导 ,对该地区的耕作侵蚀进行了模拟 ,获得了能够直接计算出坡面剖面任何一点净侵蚀模数的耕作侵蚀模型 ,结果表明 ,在采用当地由动物牵引的传统犁在坡面上自下而上进行往返横坡等高向下翻土耕作方式下 :1)一次耕作导致的耕层土壤朝坡向方向平均水平运动距离随坡度的变化表现为线性相关 ;2 )一次耕作导致的坡面剖面任何位置耕层断面的净侵蚀模数 ,受土壤容重、耕作深度、土壤与耕作条件决定的系数和地形曲率的影响。

Tillage erosion is a new field of soil erosion research. To quantitatively describe processes of tillage erosion in loess region of China, this paper modeled the tillage erosion here by conducting tillage experiment, in which small cubes were used as the tracers to trace and monitor soil movement, and regressive and theoretical analyses, and developed the model of tillage erosion with which net erosion modulus at any point of slope profile can directly be calculated. The results showed that in the case of a...