Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Inundation Analysis on the Region of Lower Elevation of a New Port by Using SWMM5 and UNET Model - Yongwon-dong, Jinhae-si

SWMM5와 UNET 모형을 이용한 신항만 저지대 침수분석 - 진해시 용원동

  • Lee, Jung-Min (Land & Urban Research Institute, Korea Land Corporation) ;
  • Lee, Sang-Ho (Department of Civil Engineering, Pukyong National University) ;
  • Kang, Tae-Uk (Department of Civil Engineering, Pukyong National University)
  • 이정민 (한국토지공사 국토도시연구원) ;
  • 이상호 (부경대학교 건설공학부) ;
  • 강태욱 (부경대학교 건설공학부)
  • Received : 2007.11.05
  • Accepted : 2008.06.23
  • Published : 2008.07.30
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Abstract

We analyzed characteristics of rainfall-runoff for the channel of Yongwon area made by a new port construction. And we conducted inundation analysis on the region of lower elevation near the coast. SWMM5 was calibrated with the storm produced by the typhoon Megi from August 19 to August 20 in 2004, and was verified with the storm from August 22 to August 22 in 2004. We performed hydraulic channel routing of Yongwon channel about typhoon Megi from August 19 to August 20 in 2004 by UNET model which is a hydraulic channel routing. The simulated runoff hydrographs were added to the new stream as lateral inflow hydrographs and a watershed runoff hydrograph was the upstream boundary condition. The downstream boundary condition data were estimated by the measured stage hydrographs. The maximum stage that was calculated by hydraulic channel routing was higher than the levee of inundated region in typhoon Megi. Thus we can suppose an inundation to have been occurred. We performed inundation analysis about typhoon Megi from August 19 to August 20 in 2004 and flood discharge of return period 10~150 years. And we estimated each inundation area. The inundation areas by return periods of storms were estimated by 3.4~5.7 ha. The causes of inundation are low heights of levee crests (D.L. 2.033~2.583 m), storm surges induced by typhoons and reverse flow through the coastal sewers (D.L. -0.217~0.783 m). A result of this study can apply to establish countermeasure of a flood disaster in Yongwon.

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References

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