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http://dx.doi.org/10.3741/JKWRA.2015.48.8.685

Deriving Channel Width-discharge Relationship from Remote Sensing Imagery and Digital Elevation Models  

Kim, Jong Chun (School of Civil, Environmental, and Architectural Engineering, Korea University)
Paik, Kyungrock (School of Civil, Environmental, and Architectural Engineering, Korea University)
Publication Information
Journal of Korea Water Resources Association / v.48, no.8, 2015 , pp. 685-693 More about this Journal
Abstract
We propose a method for deriving the relationship between channel width and discharge from remote sensing products. Stream widths at points distributed along a river network can be measured from high-resolution remote imagery. Further, corresponding drainage area for these points can be calculated using digital elevation models, making it possible to construct width-drainage area relation. On the other hand, the relationship between the flow discharge and the drainage area is obtained from historical data measured at ground stations. By coupling these two relationships, we can finally derive the width-discharge relationship which comprises an important component of downstream hydraulic geometry. The proposed method was tested for the Nakdong River and the Seomjin River, successfully capturing power-law exponents in the width-discharge relationships reported in earlier studies. The proposed approach can serve as an alternative for obtaining the hydraulic geometry relationship under the limits of ground data.
Keywords
hydraulic geometry; digital elevation models; remote sensing imagery; river network;
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Times Cited By KSCI : 1  (Citation Analysis)
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