中国水土保持科学2013，Vol.11Issue(3)：66-72,7.
基于DEM的密云水库上游流域特征提取与分析
Extraction and analysis of the watershed features based on the Digital Elevation Model of the Miyun Reservoir
摘要
Abstract
The contours map of upstream in Miyun Reservoir in Beijing was the basic data for DEM generation supported by ArcGIS software.Drainage network and basin were graded by slope,aspect and drainage network extracted from DEM.Detailed statistical analysis were used to analyze the characteristic of divided drainage basin.The results showed that areas which heights ranged from 130 to 1 695 m and from 500 to 1 000 m occupied 55.03％ of total area.Slope gradient more than 25 degrees took up 68.53％ of studied area,where the potential strong erosion risks may exist.The ratio of shady slope to sunny slopes was almost 1:1.The drainage network was divided into 9 levels,and totally 16 sub-basins.The soil erosion intensity and river confluence and storage capacity of each sub-basin were obtained from the analysis of the river density,the shape coefficient,the coefficient of river bend,the stream gradient and so on.The results could provide references of watershed management planning and hydrological model establishment.关键词
DEM/ArcGIS/河网特征/子流域划分Key words
DEM / ArcGIS/ river network features/ sub-basin division分类
建筑与水利引用本文复制引用
朱海玲,杨晓晖,张学培,魏天兴,林田苗..基于DEM的密云水库上游流域特征提取与分析[J].中国水土保持科学,2013,11(3):66-72,7.基金项目
公益性行业科研专项经费项目"都市型自然保护区保护与适应性关键技术研究"(201004053) （201004053）
