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http://dx.doi.org/10.17820/eri.2019.6.1.001

Impact on Fish Community by Restoration of Ecological Waterway using Physical Habitat Simulation  

Choi, Heung Sik (Department of Civil Engineering, Sangji University)
Choi, Jonggeun (Department of Civil Engineering, Sangji University)
Choi, Byungwoong (School of Engineering, The University of Newcastle)
Publication Information
Ecology and Resilient Infrastructure / v.6, no.1, 2019 , pp. 1-11 More about this Journal
Abstract
This study performed the impact of ecological waterway on fish community in a reach of the Dal River, Korea. Fish monitoring revealed that 9 fish species are dominant, namely Zacco platypus, Coreoleuciscus splendidus, Zacco koreanus, Pungtungia herzi, Acheilognathus yamatsutae, Rhinogobius brunneus, Tanakia signifer, Gobiobotia macrocephala, and Pseudopungtungia tenuicorpus, and account for 95% of the total fish community. The River2D model was used for the computation of the flow and the HSI model for the habitat simulation. The restoration of the waterway performed through the small dam removal, the formation of the pool-riffle structure, and the change of the bed elevation and width. Simulation results indicated that the restoration of the ecological waterway effects significantly increased by about 16% for the WUA (Weighted Usable Area) of the total fish community in optimal ecological flow conditions ($Q=7.0m^3/s$). The restoration of the ecological waterway is more advantageous to fish community.
Keywords
Fish community; Habitat suitability curve; Physical habitat simulation; Restoration of the ecological waterway; Weighted Usable Area;
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