摘要
以1∶5万地形图为数据源,通过建立流域数字高程模型,采用基于变分法的分形维数计算模型和ArcGIS的窗口分析功能,对大理河流域中的10条子流域地貌分形维数进行了计算,分析了其空间变异特点。结果表明,大理河流域地貌分形维数从上游至下游呈明显增加趋势,右岸流域地貌分形维数平均值大于左岸,地貌分形维数较好地揭示了大理河流域地貌破碎程度和复杂程度的空间变异特点。本研究对于促进地貌分形维数在地貌学及水土流失预报等领域的应用研究具有重要意义。
Based on the topographic map of 1 ： 50 000, fractal dimensions and their spatial variation characteristics of 10 sub-watersheds in Dali River watershed were calculated and analyzed through the construction of digital elevation model （DEM） and by the fundamental principle of variational method and the functions of ArcGIS 9.2 Windows analysis. Results showed that the geomorphologic fractal characteristics of Dali River watershed revealed the spatial variation of topography fragmentation extend and complexity degree, with fractal dimentions increasing significantly from upper stream to down stream and the geomorphologic fractal dimension of right bank being more than that of left bank. The study is of great scientific significance to propel the application of geomorphologic fractal dimensions in the fields of geomorphology and soil and water loss.
出处
《水土保持通报》
CSCD
北大核心
2008年第5期104-107,共4页
Bulletin of Soil and Water Conservation
基金
国家自然科学基金项目(40301026)
国家重点基础研究发展计划项目(2007CB407206)
国家科技支撑项目(2006BAD09B02)
关键词
大理河流域
变分法
地貌分形特征
空间变异
Dali River watershed
variational method
geomorphologic fractal characteristic
spatial variation
