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http://dx.doi.org/10.3741/JKWRA.2022.55.12.1041

Estimation of ecological flow and fish habitats for Andong Dam downstream reach using 1-D and 2-D physical habitat models  

Kim, Yongwon (Department of Civil, Environmental and Plant Engineering, Graduate School, Konkuk University)
Lee, Jiwan (Division of Civil and Environmental Engineering, College of Engineering, Konkuk University)
Woo, Soyoung (Department of Civil, Environmental and Plant Engineering, Graduate School, Konkuk University)
Kim, Soohong (Water and Land Group, Division for Integrated Water Management, Korea Environment Institute)
Lee, Jongjin (Bio-Monitoring Center Inc.)
Kim, Seongjoon (Division of Civil and Environmental Engineering, College of Engineering, Konkuk University)
Publication Information
Journal of Korea Water Resources Association / v.55, no.12, 2022 , pp. 1041-1052 More about this Journal
Abstract
This study is to estimate the optimal ecological flow and analysis the spatial distribution of fish habitat for Andong dam downstream reach (4,565.7 km2) using PHABSIM (Physical Habiat Simulation System) and River2D. To establish habitat models, the cross-section informations and hydraulic input data were collected uisng the Nakdong river basic plan report. The establishment range of PHABSIM was set up about 410.0 m from Gudam streamflow gauging station (GD) and about 6.0 km including GD for River2D. To select representative fish species and construct HSI (Habitat Suitability Index), the fish survey was performed at Pungji bridge where showed well the physical characteristics of target stream located downstream of GD. As a result of the fish survey, Zacco platypus was showed highly relative abundance resulting in selecting as the representative fish species, and HSI was constructed using physical habitat characteristics of the Zacco platypus. The optimal range of HSI was 0.3~0.5 m/s at the velocity suitability index, 0.4~0.6 m at the depth suitability index, and the substrate was sand to fine gravel. As a result of estimating the optimal ecological flow by applying HSI to PHABSIM, the optimal ecological flow for target stream was 20.0 m3/sec. As a result of analysis two-dimensional spatial analysis of fish habitat using River2D, WUA (Weighted Usable Area) was estimated 107,392.0 m2/1000 m under the ecological flow condition and it showed the fish habitat was secured throughout the target stream compared with Q355 condition.
Keywords
PHABSIM; River2D; HSI; Zacco platypus; Ecological flow;
Citations & Related Records
Times Cited By KSCI : 7  (Citation Analysis)
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