摘要
本文利用DEM数据,运用基岩河道侵蚀模型提取九龙江北溪流域的河流下凹程度、陡峭指数和蜿蜒度等地貌指数研究北溪流域地质构造活动特点。通过对流域地貌参数的分析发现九龙江北溪流域陡峭指数存在自NW向SE递减的规律,陡峭指数和蜿蜒度有很好的对应关系.排除气候因素和基岩性质等影响因子,认为河道陡峭指数的分布特征揭示了九龙江北溪流域的地壳抬升速率自西北向东南递减的分布特征,此认识与前人采用精密水准资料计算地壳垂直运动速率结果相一致。
River concave degree index,steep index and sinuosity index extracted from DEM data by using bedrock channel erosion mode are used for reveal the geologic structure activity characteristics in Beixi river basin,Jiulongjiang area.Through the analysis of geomorphic parameters,there is the law of diminishing from northwest to southeast.Rule out Climate factors and back rock factors,we consider that the distribution of river steep index reveals the regularity of uplift rate change（diminishing from northwest to south east） of Beixi river basin,Jiulongjiang area,which is similar to the result of crust movement rate from using method of precision level material calculating vertical.
出处
《华南地质与矿产》
CAS
2012年第1期79-83,共5页
Geology and Mineral Resources of South China
基金
国家科技支撑计划项目(2007BAH16B01)
关键词
DEM
河道基岩侵蚀力模型
地貌指标
构造抬升速率
DEM
river bedrock erosion force model
geomorphic characteristic
tectonic uplift rate
