单一流向算法和多流向算法下的地形指数比较研究——以山西吉县蔡家川小流域为例  

Research on Comparing the Topographic Index Based on the Single Flow Direction Arithmetic and Multiple Flow Direction Arithmetic——Treating Caijiachuan Small Watershed in Ji County of Shanxi Province as Sample

作　　者：刘利峰[1] 毕华兴[1] 

机构地区：[1]北京林业大学水土保持学院,北京100083

出　　处：《水土保持研究》2006年第6期309-310,313,共3页Research of Soil and Water Conservation

基　　金：人事部留学回国人员科技活动择优资助项目"黄土区嵌套小流域降雨径流过程中地形特征指数的尺度辨析与转换"

摘　　要：在地理信息系统平台———美国Micro Images公司开发的TNTmips6.9上,以山西吉县蔡家川小流域1/10000地形图为原始数据,经一系列处理得到该小流域的数字高程模型。使用自行开发的基于单一流向算法和多流向算法的地形指数计算程序,以生成的DEM为源数据,计算出蔡家川小流域的地形指数。通过对两种算法下地形指数的分析比较发现:多流向算法下得到的地形指数其最大值、中值、最小值均小于单一流向算法下的值,而且分布区间也偏小。The DEM of the Caijiachuan small watershed was obtained by treating the topographic map on the scale of one to thousand of the small watershed on the GIS platform TNTmips6.9. The topographic index of the small watershed was caculated using the programs which were developed independently on the base of the single flow direction arithmetic and the multiple flow direction arithmetic. It is found that the max and the median and the minimum of the topographic index on the base of the multiple flow direction arithmetic were less than that on the base of the single flow direction arithmetic and the distribution interval of the topographic index on the base of the multiple flow direction arithmetic was smaller than that on the base of the single flow direction arithmetic.

关 键 词：地形指数 单一流向算法 多流向算法 蔡家川小流域 DEM TNTmips6.9 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]