黄土丘陵沟壑区地表过程响应单元划分及其地形特征提取

黄土丘陵沟壑区地表过程响应单元划分及其地形特征提取秦伟;朱清科;左长清;赵磊磊;邝高明;王昭艳;张京凤;单志杰

【期刊名称】《中国水土保持科学》

【年(卷),期】2012(010)001

【摘要】The analysis and regulation of earth surface processes is an important way to ensure human living in harmony with nature. Further, dividing the response unit to earth surface processes efficiently and reasonably is an important premise for the earth surface processes research. Aim at the topography differentiation characteristics of soil erosion in the Hilly-gully Region of Loess Plateau, we put forward that the gully line, ridges line, divide line and shoulder line of valleys were extracted by overlapping in a watershed, which will benefit to make up earth surface processes response units with relatively homogeneous gradient, aspect and position of the slope. The extraction method of the gully line, ridges line, divide line and shoulder line of valleys form hydrologically correct DEM data were presented separately, and measuring technology for the topographic characteristics of response units to earth surface processes such as average gradient, overall aspect, area and perimeter were presented in ArcGIS9. 2 software. It can be concluded that fast division of response units to earth surface processes were finished and their topographic characteristics were effectively extracted. The results in this paper will play an important basic function