KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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Bed Changes downstream the Singok Submerged Weir in the Han River Estuary - from 2009 to 2010

한강 하구 신곡수중보 하류에서 하상변동 - 2009년부터 2010년까지

  • Hwang, Seung-Yong (Korea Institute of Civil Engineering and Building Technology) ;
  • Lee, Samhee (Korea Institute of Civil Engineering and Building Technology)
  • 황승용 (한국건설기술연구원 국토보전연구본부) ;
  • 이삼희 (한국건설기술연구원 국토보전연구본부)
  • Received : 2018.10.29
  • Accepted : 2018.11.15
  • Published : 2018.12.01
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Abstract

The bed change survey was carried out and its tendency was analyzed at the downstream of the Singok Submerged Weir in the Han River Estuary (HRE). In order to focus on the bed change in the low flow channel, we calculated the mean bed elevation based on the bankfull discharge. Thanks to the amount of bed changes calculated by using the 'averaged bed', we could compare the riverbeds of various periods with consistent criteria. In the HRE, revealed was the bed change cycle between degradation by flood and aggradation by tide at the non-flood season.

한강 하구 신곡수중보 하류에서 하상변동 조사를 실시하고 평균 하상고와 하상변동량을 계산하여 하상변동 경향에 대해 검토하였다. 저수로 하상변화에 초점을 맞추기 위해 부등류 계산을 통한 시행착오법으로 '저수로 만제 유량'을 설정하여 평균 하상고를 산정하였다. '평균 하상'을 기준으로 계산된 하상변동량 덕분에 여러 시기 하상을 일관된 기준으로 비교할 수 있었다. 한강 하구에서 하상변동 경향은 홍수에 따른 저하와 비홍수기 조석에 따른 상승의 순환으로 드러났다.

Keywords

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Fig. 1. Site Map of the Han River Estuary

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Fig. 2. Invert Elevations Downstream the Singok Sub. Weir

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Fig. 3. Mean Bed Elevations Based on Design Flood

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Fig. 4. Design and Bankfull Stages (Section No. 16)

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Fig. 5. Mean Bed Elevation Based on Bankfull Discharge

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Fig. 6. Bed Changes downstream the Singok Sub. Weir ('08 ~ '10)

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Fig. 7. Determination of 'Averaged Bed' (Sec. No. 28)

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Fig. 8. Bed Changes to 'Averaged Bed' ('09 ~ '10)

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Fig. 9. Bed Changes to 'Averaged Bed' ('04 ~ '10)

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Fig. 10. Cumulated Bed Changes to 'Averaged Bed' ('04 ~ '10)

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Fig. 11. Total Cumulative Bed Changes and Daily Runoffs

References

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