M-DEM-based stream extraction and fractal dimension calculation for artificial backhoe cultivated loess slope
In this paper a M-DEM for artificial backhoe cultivated loess slopes is built based on laboratory experiment. Then, the stream networks for different catchment thresholds (minimum river length) are extracted with the help of ArcGIS 9. 3 soft package. Correspondingly, the fractal dimensions are calculated based on the grid method. The results show that when the catchment threshold is 25, the extracted stream network fits the actual surface microtopography best with a highest coefficient of determination (R2 = 0. 971) and the fractal dimension is D = 1. 087. Generally, a methodology about a microtopographic stream with its fractal dimension is illustrated, and it is safe to be adopted for further surface microtopographic research.
fractal dimension calculationcultivation measurecatchment area thresholdArcGIS
国家科技期刊平台
NSTL
万方数据
维普
