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Calculation of the Fractal Dimension Based on DEM and the Study of the Significance of Tectonic Landform—Take the Ganzi-Dege Section of Yalong River as an Example
Author(s): 
Pages: 359-363+378
Year: Issue:  4
Journal: Yantai Teachers University Journal, Natural Science Edition

Keyword:  DEMfractal dimensionYalong RiverGanzi-Yushu fault;
Abstract: Based on DEM,the information of river networks of the Ganzi-Dege section of Yalong River basin is extracted by Arc GIS10. 2 software. Through the grid simulation method,the fractal dimension of the Yalong River and Yulong River is calculated. The fractal dimension of the Yalong River is 1. 1036 and the data of Yulong River is 1. 0169. According to the relationship between catchment threshold and fractal dimension,the reasonable catchment threshold is confirmed as 5000. According to the data of fractal dimension and predecessors’ research data,the physiognomy of the study area is in infancy,and the down cutting is typical of the river. The crust uplift leads to the increase of fractal dimension,but the effect degree needs further research. The Ganzi-Yushu fault leads to the linearization of the watercourse and the decrease of fractal dimension.
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