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http://dx.doi.org/10.17820/eri.2017.4.3.169

Stable Channel Design for Physical Disturbance Reduction and Analysis of Habitat Suitability  

Lee, Woong Hee (Department of Civil Engineering, Sangji University)
Moon, Hyong Geun (Jung Engineering Corporation, Limited)
Choi, Heung Sik (Department of Civil Engineering, Sangji University)
Publication Information
Ecology and Resilient Infrastructure / v.4, no.3, 2017 , pp. 169-179 More about this Journal
Abstract
This study analyzed the aspect of bed change according to the stable channel design on the Wonju River to quantitatively evaluate habitat suitability (HS). According to the result of evaluating stable channel of object section in the Wonju River, 17 sections among total 20 sections were stable and 3 sections were unstable. Physical disturbance improvement evaluation (PDIE) was the range average showed good disturbance condition with a range average of 112.17 points. Habitat suitability index of Zacco Koreanus, the most dominant species of the Wonju River, was used for analysis of physical habitat for fish. According to the physical habitat analysis result, HS was 0.16 and weighted usable area (WUA) was $347.68m^2$. The methods of improving/introducing/removing structures and dredging stream channel were used for stable channel design of unstable channel, and analyzed PDIE according to the aspect of bed change and changes in habitat suitability. Stable channel design was possible in 19 sections in times of structures improvement/introduction/removal, and PDIE was 117.53 points, HS was 0.14 points, and WUA was $313.37m^2$. Stable channel design was possible in all 20 sections when dredging the stream channel. PDIE was 116.50 points, HS was 0.16, and WUA was $332.14m^2$. Therefore, this study obtained channel design measures that can improve physical soundness and stability of the Wonju River, and it was analyzed that it will have no impact on changes of physical disturbance and physical habitat. Furthermore, this study analyzed velocity and depth of each section and appearance frequency of riffle and pool to analyze correlation between physical disturbance and physical habitat. According to the analysis result, it was identified that the analysis of riffle and pool showed similar result as the evaluation result of physical habitat.
Keywords
Habitat suitability; Physical disturbance; Physical disturbance improvement evaluation; Physical habitat; Stable channel design;
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Times Cited By KSCI : 6  (Citation Analysis)
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