Micro-Topographic Characteristics in Coordinate with Surface Erosion

Abstract

In the process of water erosion, the transformation of surface morphology itself has an impact on the production of surface runoff, water flows, convergence, thereby affect the evolution of soil erosion types and erosion sediment yield (Burwell, et al.,1968; Johnson, et al.,1979; Onstad et al.,1984). From 1960s, many scholars had carried out a series of studies on the water erosion evolution process, including the research about surface morphology factors, measurement and design procedure, surface hydrological erosion processes and so on(Allmaras,et al., 1972; Lehrsch, et al., 1987; Wang, et al., 2005). However, due to the randomness of surface topography in the process of erosion, there still had some limitation to people’s understanding about the relationship between soil erosion and surface morphology(Huang, et al., 1992, 2001, 2003) . In this study, it simulated different surface erosion periods under different surface tillage micro-morphology. Based on the comparative analysis and quantitative study, the characteristic of micro-morphology with its response mechanism in coordinate with surface erosion was illustrated. The results would be helpful to promote understanding of soil erosion processes in depth.