贵州省乌江流域地貌定量研究

Quantitative research of landforms on the Wujiang river basin of Guizhou province

DEM空间数据分析技术为传统的地貌研究在地形可视化、统计分析等领域提供了新的研究手段。以贵州省内乌江流域为研究对象,运用地理信息系统平台,加载DEM,提取高程、坡度、地表起伏度等地貌要素与地质图、构造图、行政区划图叠加分析,对流域地貌进行定量分析。结果表明:贵州省内乌江流域层状展布地貌,反映出受新构造运动间歇性抬升的影响,流域总体上呈现出有序的阶梯状组合;地形坡度和起伏度较大的区域,地质构造作用明显;地形坡度和起伏度较小的区域主要发育在新构造运动抬升的台面上以及岩性较软的地方。

DEM spatial data provides a new research method for the study of the traditional landscape in terrain visualization, statistical analysis. This paper focused on the Wujiang river basin of Guizhou province, in the study area for using （;IS and load DEM for extracting Landscape elements such as elevation, slope, the surface fluctuation degree, combined with the geology statistics and images, discussed about the drainage geomorphology of Wujiang river basin of Guizhou province. This study proved that ： the layer exhibition cloth of landforms of wujiang river basin, obvious reflect that the influence of neotectonic movement＇ s of intermittent uplift, the overall basin shows orderly ladder shape combination; Terrain gradient and the topography fluctuation of the area for larger, geological structures obviously. Terrain slope and the ups and downs in a smaller area on the mesa of major development in the new tectonic uplift and lithology are weak.