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http://dx.doi.org/10.4491/KSEE.2017.39.6.339

Assessment of Ecological Flowrate and Fish Community to Weir Type in Stream  

Hur, Jun Wook (Bio-Monitoring Center)
Jang, Chang Lae (Department of Civil Engineering, Korea national university of transportation)
Kim, Kyu Ho (Korea Institute of Civil Engineering and Building Technology)
Publication Information
Journal of Korean Society of Environmental Engineers / v.39, no.6, 2017 , pp. 339-347 More about this Journal
Abstract
The objectives of this study were to analyze ecological characteristics of fish compositions and estimate the optimal ecological flow using the physical habitat simulation system (PHABSIM) in Wonju stream and Boseong river. We sampled fishes using two gears such as casting net and kicknet to determine fish distribution and also measured flow velocity, water depth, bed material at the point where fish collected. Total number of species and individuals sampled were 20 and 2,104, respectively and dominant species was Zacco platypus (39.7%) and subdominant species was Z. koreanus (RA: 15.8%) in Wonju stream. In Boseong river, collected fishes were 1,638 individuals, 28 species. Dominant and sub-dominant species was Z. platypus (RA: 22.0%) and Microphysogobio yaluensis (RA: 17.2%), respectively. For calculating habitat suitability index (HSI), we selected Z. platypus as representative fish species and analyzed water depth and flow velocity. Water depth and flow velocity were 0.2-0.6 m, 0.1-0.3 m/s, respectively in Wonju stream and 0.3-0.6 m, 0-0.3 m/s, respectively in Boseong river. According to the analysis of ecological flow simulation, optimal flow was 1.1 cms and 0.3 cms in Wonju stream and 0.4cms, 2.2cms in Boseong river at up and down stream respectively. WUA (Weighted Usable Area) was 9.5%, 26.6% in Wonju stream and 34.8%, 53.3% in Boseong river at up and down stream respectively.
Keywords
Fish; Ecological Flow; Weir Type; Habitat Suitability Index (HSI); Physical Habitat Simulation System (PHABSIM);
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Times Cited By KSCI : 4  (Citation Analysis)
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