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黄土人工锄耕坡面微地形是地表径流和土壤侵蚀过程的重要影响因素。文中在1.0 mm/min雨强的人工模拟降雨试验条件下,采用微地形激光扫描测量方法获取5°人工锄耕坡面微地形相对高程,并进行拟合模型参数验证,进而构建了能反映真实地表情况的高精度M-DEM,并在ArcGIS中对其特征参量进行量化研究。结果表明:黄土人工锄耕坡面微地形起伏较小,整体属于凸形斜坡;虽在某些区域容易形成地表径流,但径流变化比较平缓,不容易形成较大的水流;微地形水系分维能较好地反映复杂微地形特征。论文可为在微地形层面进一步揭示黄土耕作坡面土壤侵蚀机理研究提供数据支持和方法参考。
The micro-topography of artificial hoeing slope in loess area is an important influencing factor of surface runoff and soil erosion. In this paper, the relative elevation of 5 ° artificial hoeing slope micro-topography was obtained by using micro-terrain laser scanning method under artificial rainfall test conditions of 1.0 mm / min rainfall intensity, and the fitting model parameters were validated to build a model that can reflect the real Surface conditions of high-precision M-DEM, and its characteristic parameters in the ArcGIS quantitative research. The results show that the micro-topography of the artificial hoeing slope in Loess Plateau is small and the whole belongs to the convex slope. Although the surface runoff is easy to form in some areas, the variation of runoff is relatively gentle and the water flow is not easy to form. Can better reflect the complex micro-topographic features. The paper can provide data support and method reference for further revealing soil erosion mechanism of loess tillering on the micro topography.