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http://dx.doi.org/10.3741/JKWRA.2016.49.2.83

An analysis on geomorphic and hydraulic characteristics of dominant discharge in nam river  

Kim, Ki Heung (Dept. of Civil Engineering, Gyeongnam National University of Science and Technology)
Lee, Hyeong-Rae (Dept. of Civil Engineering, Gyeongnam National University of Science and Technology)
Jung, Hea Reyn (Dept. of Civil Engineering, Gyeongnam National University of Science and Technology)
Publication Information
Journal of Korea Water Resources Association / v.49, no.2, 2016 , pp. 83-94 More about this Journal
Abstract
Geomorphological, bed material and hydraulic characteristics are basis informations for the planning, design and management of the river in the aspect of flood control and environmental conservation, and it is very important to use these informations for the design of stable channel. In this study, dominant discharge was selected, geomorphological and hydraulic characteristics were analyzed using that discharge and also the characteristics of bed materials distribution were analyzed and bed materials-flow resistance relationship was evaluated, for the upstream section of Namgang dam. The dominant discharge was estimated a return period of approximately 1.5 year and stream type were classified Segment 1 and Segment 2 in this stream. Also, the frequency of riffle-pool showed 4.4 because this study area has the characteristics of natural channel that have not channel-crossing structures. In dominant discharge, according to the results that analyzed relationship between $h/d_{50}$ and $V/u_*$ to calculate flow resistance by bed materials, Julian's formula showed to appropriate in channel where is relatively close to natural river and is predominantly consisted of gravel, cobble, boulder and rock in mountain, and it was confirmed that the image processing methodology will be easily applied to the analysis of bed materials distribution in future.
Keywords
Natural river; Bed materials; Bed slope; Channel width; Frictional force;
Citations & Related Records
Times Cited By KSCI : 7  (Citation Analysis)
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