IMHE OpenIR  > 成都山地所知识仓储(2009年以前)
The extraction and quantitative analysis of channel junctions based on DEMs
Youfu, Dong1,2; Guoan, Tang1; Mingliang, Luo1,3
Source PublicationProceedings of SPIE - The International Society for Optical Engineering
Author of SourceSPIE
meetingGeoinformatics 2008 and Joint Conference on GIS and Built Environment: Advanced Spatial Data Models and Analyses
Conference DateJune 28, 2008 - June 29, 2008
Conference PlaceGuangzhou
Contribution Rank3
AbstractChannel junctions are the intersection points of different gullies in a drainage area. Base onDEM data and GIS process, an effective extraction method of channel junctions is proposed at first in this paper. Then with the definition of channel junction density being introduced, the rationality and validity that it is used to describe erosion intensity at macro-scale is explored. Meanwhile, the quantitativedifference of channel junction density in the Loess Plateau in North Shaanxi Province of China is analyzed.The experiment results show that there is a strong correlation of channel junction density and gully density. Moreover, channel junction density keeps more sensitive than gully density when proper threshold values are applied at different grid resolution scales. In addition, channel junction density and the loess landform types correlate intensively, which reveals the great potential significance of channel junctions ongeomorphology research. At the same time, the variations of channel junction density at different order levels in the typical watersheds are discussed. So, the research is hopeful in deepening our understandingon landform characteristics and evolutions of the Loess Plateau.
KeywordChannel junctions Drainage area Erosion intensity Extraction method Grid resolution Intersection points Loess Plateau Strong correlation
Indexed ByEI
Accession numberAccession number:;20091311985932
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Document Type会议论文
Affiliation1.Key laboratory of Virtual Geographic Environment, Nanjing Normal University, Ministry of Education, Nanjing, Jiangsu, China;
2.College Of Civil Engineering, Nanjing University of Technology, No.200, Zhongshan North Road, Nanjing, Jiangsu, China;
3.Institute Of Mountain Hazards And Environment, Chinese Academy of Science, No. 9, Block 4, Renmingnan Road, Chengdu, Sichuan, China
Recommended Citation
GB/T 7714
Youfu, Dong,Guoan, Tang,Mingliang, Luo. The extraction and quantitative analysis of channel junctions based on DEMs[C]//SPIE,2008:71462N.
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