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http://dx.doi.org/10.17820/eri.2015.2.1.033

A Correlation Analysis between Physical Disturbance and Fish Habitat Suitability before and after Channel Structure Rehabilitation  

Choi, Heung Sik (Department of Civil Engineering, Sangji University)
Lee, Woong Hee (Department of Civil Engineering, Sangji University)
Publication Information
Ecology and Resilient Infrastructure / v.2, no.1, 2015 , pp. 33-41 More about this Journal
Abstract
In this study, an optimal improvement method of stream channel structure is presented for the enhancement of fish habitat suitability by genetic algorithm. The correlation between fish habitat suitability and physical disturbance in stream is analyzed according to the changes of hydraulic characteristics by channel structure rehabilitation. Zacco koreanus which is an indicator fish of the soundness of aquatic ecosystem was selected as a restoration target species by investigating the community characteristics of fish fauna and river environments in Wonju stream. The habitat suitability is investigated by PHABSIM with the habitat suitability index of Zacco koreanus. Hydraulic analysis by HEC-RAS and physical disturbance evaluation in stream are carried out. The optimal channel width modified for the enhancement of fish habitat suitability is provided. The correlation analysis between habitat suitability and physical disturbance with the change of hydraulic characteristics by channel modification showed that the proper channel modification enhanced fish habitat suitability and mitigated physical disturbance in the stream. The improvement of physical disturbance score by the channel structure rehabilitation for the enhancement of fish habitat suitability was confirmed in this study.
Keywords
Channel structure rehabilitation; Fish habitat suitability; Genetic algorithm; Physical disturbance evaluation;
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Times Cited By KSCI : 8  (Citation Analysis)
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