Micro-geomorphology characteristics in coordinate with surface erosion
In order to reveal the inconstant micro-morphology evolution mechanism in the process of surface erosion, relative concepts were illustrated firstly. Then this paper adopted methods of artificial rainfall experiments, laser scanning, GIS analysis to explore micro-geomorphology characteristics under the condition of the rain intensity of 60 mm/h and 120 mm/h, combined with 4 kinds of tillage practice measures including contour tillage (CT), artificial digging (AD), artificial backhoe (AH) and control measures (CK). The results showed that: (1) The statistical frequency of the elevation distribution of micro-geomorphology was in weak variability and the curve approximately followed the normal distribution. In the ShE stage, the elevation distribution tends to be flattened overall, and the rainfall influence the distribution characteristics of surface elevation in the order of AD> CT>AH; (2) Rainfall affect the micro-slope distribution of CK surface slightly. The micro-slope grid number curve of AD, AH and CT surface at 2 rainfall stages present X-type, and they intersects at micro-slope from 15° to 35° respectively; (3)The rainfall can lead to the transformation of surface micro-geomorphology, but it has little effect on the micro-aspect. Forthmore, surface micro-aspect has the same trend of grid distribution whether it is under the rainfall intensity of 60 mm/h or 120 mm/h. All of these could provide theoretical basis for the in-depth study of mechanism and process of soil erosion.
micro-geomorphology micro-slope micro-aspect soil erosion
ZHANG Qingfeng ZHAO Longshan WU Faqi WANG Jian GAO Shujing
Key Lab for Agricultural Resources and Environmental Remediation in Loess Plateau of Agriculture Min Key Lab for Agricultural Resources and Environmental Remediation in Loess Plateau of Agriculture Min
国际会议
西安
英文
244-247
2010-10-11（万方平台首次上网日期，不代表论文的发表时间）