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http://dx.doi.org/10.12652/Ksce.2010.30.3B.305

Stable Channel Analysis and Design for the Abandoned Channel Restoration Site of Cheongmi Stream using Regime Theory  

Ji, Un (명지대학교 공과대학 토목환경공학과)
Julien, Pierre Y. ((미)콜로라도 주립대학교 공과대학 토목공학과)
Kang, Joon Gu (한국건설기술연구원)
Yeo, Hong Koo (한국건설기술연구원)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.30, no.3B, 2010 , pp. 305-313 More about this Journal
Abstract
River restoration or rehabilitation should be conducted in a way to maximize the channel stability with natural river configuration close to the equilibrium condition considering divers aspects of fluvial hydraulics, erosion and sedimentation, fluvial geomorphology, and ecological environment and to minimize the maintenance work. Therefore, the channel stability evaluation for present condition based on the equilibrium channel concept should be preceded for the river restoration project. Methods for equilibrium channel theory have generally been developed following either analytical regime theory or empirical regime theory. The main purpose of this paper is to evaluate the stability of present channel condition for the section of abandoned channel restoration in Cheongmi Stream using the Stable channel Analytical Model (SAM) and equilibrium hydraulic geometry equations. The results of analytical and empirical regime theories should provide fundamental and essential information to design the stable channel geometry. As a calculation result of Copeland's method for the study reach, the equilibrium channel has a narrower channel width, deeper water depth, and more gentle slope than the present channel geometry. As results of equilibrium hydraulic geometry equations, predicted equilibrium widths are less than the channel width in the field. It is represented that the current bed slope must be gentle to reach the equilibrium condition according to the results of Julien and Wargadalam method.
Keywords
river restoration; abandoned channel restoration; stable channel analytical model; regime theory; Copeland method; SAM;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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