摘要
根据野外考察和1/50,000地形图上等密度取样量测统计,表明研究区内平均沟谷密度为5.5km/km^2,3～7km/km^2的地区占84%。相对高差150～250m的地区占60%以上。区域平均坡度15°～30°的地区占68%。地貌曝露面3.1～6km^2/km^2的地区占64.54%。给出了相对高差、地貌曝露面及土壤侵蚀模数区域分布的趋势面分析模型。通过聚类分析将研究区划分为二大类型组合区、八个亚区和十三个小区。论述了区内类型组合、环带镶嵌的地貌特点。
Based on the field survey, measuring and sampling statistics on the contouring maps (1/50,000), this paper shows that the density of the gul-lies and valleys is mainly 3 to 7 km./km.~2, which is 84 per cent of thesamples; the relative height is-150 to 250m., 60% out of the samples;the slope angles are from 15°to 30°, 68% out of the samples. The geomor-phical exposure surface is 3.1 to 6km.~2/km.~2 which is 64.54 per cent ofthe total samples. The models of the trend surface and the cluster analysisare put forward. Finally according to the principles of the morpho-geneticaland practical utilization, 4 regions and 13 locations of the lands cape aredescribed in this paper.
出处
《干旱区资源与环境》
CSCD
1989年第4期21-32,共12页
Journal of Arid Land Resources and Environment
