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Flood risk estimation with scenario-based, coupled river-overland hydrodynamic modeling

시나리오 기반 하천-제내지 연계 통합수리해석에 의한 홍수위험도 산정

  • 이재영 ((주)인시티 인프라연구소) ;
  • 남명준 ((주)인시티 인프라연구소) ;
  • 권현한 (전북대학교 공과대학 토목공학과) ;
  • 김기영 (한국수자원공사 K-water 연구원 기반시설연구소)
  • Received : 2016.07.01
  • Accepted : 2016.08.18
  • Published : 2016.09.30

Abstract

A coupled river-overland hydrodynamic model was applied to estimate flood risk by a scenario-based approach. The study area is Seongseo Industrial Complex in Daegu which is located near Nakdong river and Geumho river. Inundation depth and velocity at each time were calculated by applying a coupled 1D/2D hydrodynamic model to the target area of interest. The 2D inundation analysis for river and overland domain was performed with the scenario-based approach that there are levee overflow against 100/200 year high quantile (97.5%) design flood and levee break against 100/200 year normal quantile (50%) design flood. The level of flood risk was displayed for resident/industrial area using information about maximum depth and velocity of each node computed from the 2D inundation map. The research outcome would be very useful in establishing specified emergency action plans (EAP) in case of levee break and overflowing resulting from a flood.

본 연구에서는 시나리오 기반의 홍수위험도를 산정하기 위해 하천-제내지 통합수리 해석모형이 적용되었다. 적용대상 유역으로 낙동강 및 금호강이 위치한 대구 성서공단 인근을 선정하여 하천홍수 발생으로 인한 시간별 범람수심 및 범람유속을 산정하였다. 하천-제내지 통합수리해석에 의한 2차원 범람해석은 100년/200년 빈도 신뢰구간 상한치(97.5%)에 의한 제방월류 시나리오와 100년/200년 빈도 신뢰구간 평균치(50%)에 의한 파제 시나리오로 구성하여 수행되었다. 또한 제내지 범람에 의한 위험도 산정을 위해 2차원 홍수범람도로부터 예측된 각 절점에 대한 최대 침수심 및 유속에 대한 정보를 이용하여 등급화를 실시하였다. 본 연구결과는 제방월류 및 파제에 따른 제내지의 비상대처계획(EAP) 수립에 정량적인 근거자료로 제시하는데 매우 유용할 것으로 사료된다.

Keywords

References

  1. Ahmandian, R., Falconer, R.A., and Wicks, J. (2015). "Benchmarking of flood inundation extent using various dynamically linked 1D-2D approaches." Journal of Flood Risk Management, ISSN 1753-318X 10.1111/jfr3.12208.
  2. Choi, K.H., and Han, K.H. (2005). "Development of 2-D flood inundation model for dam failure analysis: I. Theory and Model Verification." Journal of the Korean Society of Civil Engineers, Vol. 25, No. 2B, pp. 135-142.
  3. Choi, K.H., and Han, K.H. (2005). "Development of 2-D flood inundation model for dam failure analysis: II. Applications." Journal of the Korean Society of Civil Engineers, Vol. 25, No. 2B, pp. 143-149.
  4. Di Baldassarre, G., Castellarin, A., and Brath, A. (2009). "Analysis of the effects of levee heightening on flood propagation: example of the River Po." Italy, Hydrological Sciences Journal, Vol. 54, No. 6, pp. 1007-1017. https://doi.org/10.1623/hysj.54.6.1007
  5. Fang, X., and Su, D. (2006). "An integrated one-dimensional and two-dimensional urban stormwater flood simulation model." JAWRA, Vol. 42, pp. 713-724.
  6. Hergarten, P.S.G., and Neugebauer, H.J. (1995). "An integrated model for the surface runoff and the infiltration of water." EOS, transc. Am. Geophys. Union. Vol. 76, No. 46, F320.
  7. Jang, S.H., Yoon, J.Y., Yoon, Y.N., and Kim, W.S. (2006). "Method for flood runoff analysis of main channnel connected with interior floodplain: I. Application for Analysis of Inundation Area in Interior Floodplain." Journal of the Korean Society of Civil Engineers, Vol. 26, No. 1, pp. 79-88.
  8. Kwon, H.H., Kim, J.G., and Park, S.H. (2013). "Derivation of flood frequency curve with uncertainty of rainfall and rainfallrunoff model." Journal of Korean Water Resources Association, KWRA, Vol. 46, No. 1, pp. 59-71. https://doi.org/10.3741/JKWRA.2013.46.1.59
  9. Kwon, H.H., Kim, J.G., Lee, J.S., and Na, B.K. (2012). "Uncertainty assessment of single event rainfall-runoff model using bayesian model." Journal of Korean Water Resources Association, KWRA, Vol. 45, No. 5, pp. 505-516. https://doi.org/10.3741/JKWRA.2012.45.5.505
  10. Lee, G.H., Lee, S.S., and Jung, K.S. (2010). "Development of a raster-based two-dimensional flood inundation model." KOSHAM, J. Korean Soc. Hazard Mitig., Vol. 10, No. 6, pp. 155-163.
  11. Lee, J.T., and Han, K.H. (1989). "A forecasting model for the flooded area fesulting from breached levee." Journal of Korean Association of Hydrological Sciences, Vol. 22, No. 2, pp. 223-231.
  12. Lee, J.T., Hur, S.C., Kim, J.H., and Han, K. H. (2006). "Characteristics of the inundation and process of making a flood map according to the levee break conditions in urban stream - jungrang experimental basin." Journal of Korean Water Resources Association, KWRA, Vol. 39, No. 5, pp. 383-394. https://doi.org/10.3741/JKWRA.2006.39.5.383
  13. Ministry of Land, Infrastructure and Transport (2011). "Improvement and supplement of probability rainfall in South Korea".
  14. Ministry of Land, Infrastructure and Transport (2013). "Nakdong-gang river master plan." Busan regional construction management administration.
  15. Ministry of Land, Infrastructure, Transport and Tourism (2015). "Summary of flood hazard map manual." Japan.
  16. Park, J.H. (2012). "Development of technique to estimate inundation hazard level caused by river levee failure." KOSHAM, J. Korean Soc. Hazard Mitig., Vol. 12, No. 6, pp. 287-296.
  17. Park, S.J., Choi, H.G., Huh, Y.H., and Han, K. Y. (2011). "Establishment and application of 2-Dimensional flood inundation analysis system by the collaboration of river and lowland in nam river basin." KOSHAM, J. Korean Soc. Hazard Mitig., Vol. 11, No. 6, pp. 237-247.
  18. Reis, D.S., and Stedinger, J.R. (2005). "Bayesian MCMC flood frequency analysis with historical information." Journal of Hydrology, 313, pp. 97-116. https://doi.org/10.1016/j.jhydrol.2005.02.028
  19. Scott, S., and Lall, U. (2015). "A hierarchical bayesian regional model for nonstationary precipitation extremes in Northern California conditioned on tropical moisture exports." Water Resources Research, Vol. 51, No. 3, pp. 1472-1492. https://doi.org/10.1002/2014WR016664
  20. U.S. Department of the Interior-Bureau of Reclamation (1988). "Downstream Hazard Classification Guidelines."
  21. Yeh, G.T., Huang G.B., Zhang, F., Cheng, H.P., and Lin, H.C. (2005). "WASH123D: A numerical model of flow, thermal transport, and salinity, sediment, and water quality transport in WAterSHed systems of 1-D stream-river network, 2-D overland regime, and 3-D subsurface media." Technical report Submitted to US. EPA, Department of Civil and Environmental Engineering, University of Central Florida, 4000 Central Florida Blvd., Orlando, FL.
  22. Zhai, P.X., Zhang, X., Wan, H., and Pan, X. (2005). "Trends in total precipitation and frequency of daily precipitation extremes over China." J. Climate, Vol. 18, pp. 1096-1108. https://doi.org/10.1175/JCLI-3318.1