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http://dx.doi.org/10.3741/JKWRA.2007.40.5.373

Analysis of Drainage Structure Based on the Geometric Characteristics of Drainage Density and Source-Basin  

Kim, Joo-Cheol (Industrial Technology Research Institute, Chungnam National Univ.)
Kim, Jae-Han (Dept. of Civil Engrg., Chungnam National Univ.)
Publication Information
Journal of Korea Water Resources Association / v.40, no.5, 2007 , pp. 373-382 More about this Journal
Abstract
The exact resolution of channel initiation points is not so easy because of the dynamic behaviors of water movement on the hillslope. To this end, Kim, Joocheol and Kim, Jaehan(2007) have represented the channel network in real world basins for slope-area regimes using DEM. This study is its sequential content and then proposes the reliabilities of the hypothetical channel networks identified from DEM, which are assessed based on the geometric characteristics of drainage density and source-basin. The resulting drainage structures on the natural basin can be found to be depicted remarkably depending on the hypothetical channel network applied by slop-area threshold criterion. In addition, it is shown that there is a wonderful geometric similarity between the shapes of source- basin in a geomorphologically homogeneous region. Area threshold criterion could have restricted the shape of source-basin, so that it might bring about the incorrect drainage structures. But the hypothetical channel networks identified from DEM deserves special emphasis on expressing the space-filling structures nonetheless.
Keywords
channel network; drainage density; source-basin;
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Times Cited By KSCI : 2  (Citation Analysis)
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