贵州省地表水系结构尺度效应研究

Study on Scale Effect of Surface Drainage System Characters in Guizhou Province

为了探讨运用现代信息技术所提取的水系结构受尺度变化的影响,以贵州省息烽县内两个闭合流域作为研究对象,运用GIS技术与地貌侵蚀循环理论,研究了水系结构受尺度效应的影响。研究结果表明:在尺度放大的过程中,除较高级及次高级水道数量、水道形态无影响外,其水系网内部形态、结构特征值都受尺度效应影响而变化,且这种尺度效应在地形较复杂、高差相对较大的流域,表现尤为明显。

The scale is enlarged or reduced resulting in different scales on the water law and characteristics of me ex- istence of time and space differences. In order to explore the influence of scale change on water system structure ex- tracted by modern information technology, this paper took two closed basins of Xifeng county, Guizhou province as the research object. Using GIS technology and landscape erosion cycle theory, this paper studied the scale effect of surface drainage structure characteristics of Guizhou. The results showed that the internal morphology and structural eigenvalues of the water network are affected by the scale effect, except that the number of the higher and the num- ber of secondary waterways and the channel shape are not affected. In this way,the scale effect is complex in terrain. The performance is particularly obvious in elevation of relatively large watershed.