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Physical Habitat Simulation Considering Stream Morphology Change due to Flood
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 Title & Authors
Physical Habitat Simulation Considering Stream Morphology Change due to Flood
Lee, Sungjin; Kim, Seung Ki; Choi, Sung-Uk;
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This study investigates the impact of morphological change on the physical habitat simulation. For this, CCHE2D model is used for the hydraulic analysis including the morphological change, and the physical habitat suitability is assessed with habitat suitability curves. The model is applied to a 2.5km long reach downstream of the Goesan Dam, from Sujeon Bridge to Daesu Weir. Flow data of discharge and stage in July, 2006 are used in the computation. The numerical model is verified by means of comparison with the measured water surface elevation data, and the variation of the river bed is not verified in this study. Adult Zacco platypus is chosen for the dominant species. Physical habitat simulations result in composite habitat suitability and weighted usable area for drought, low, normal, and averaged-wet flows. The simulation results indicate that the composite suitability index increased at reaches right downstream of the Sujeon Bridge and around the bend. This also increased weighted usable area by 5.4-11.3%.
Physical habitat simulation;Habitat suitability index;Morphological change;CCHE2D model;Weighted usable area;
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