• Title/Summary/Keyword: Storm Surge

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THE STORM SURGE PROBLEM IN THE BAY OF BENGAL

  • Watson, Gary
    • Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
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    • 1995.10a
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    • pp.5-8
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    • 1995
  • Every few years the low-tying coastal plains of Bangladesh are seriously flooded by storm surges, in which fierce cyclones develop in the Bay of Bengal and then move towards the coast, pushing large masses of sea water onto the land. The coastal areas are densely populated and the combination of high winds and deep floods invariably kills thousands of people. (omitted)

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Analysis on inundation characteristics by compound external forces in coastal areas (연안 지역의 복합 외력에 의한 침수 특성 분석)

  • Kang, Taeuk;Sun, Dongkyun;Lee, Sangho
    • Journal of Korea Water Resources Association
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    • v.54 no.7
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    • pp.463-474
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    • 2021
  • The various external forces can cause inundation in coastal areas. This study is to analyze regional characteristics caused by single or compound external forces that can occur in coastal areas. Storm surge (tide level and wave overtopping) and rainfall were considered as the external forces in this study. The inundation analysis were applied to four coastal areas, located on the west and south coast in Republic of Korea. XP-SWMM was used to simulate rainfall-runoff phenomena and 2D ground surface inundation for watershed. A coupled model of ADCIRC and SWAN (ADCSWAN) was used to analyze tide level by storm surge and the FLOW-3D model was used to estimate wave overtopping. As a result of using a single external force, the inundation influence due to storm surge in most of the coastal areas was greater than rainfall. The results of using compound external forces were quite similar to those combined using one external force independently. However, a case of considering compound external forces sometimes created new inundation areas that didn't appear when considering only a single external force. The analysis considering compound external forces was required to reduce inundation damage in these areas.

Analysis of Reliability of Weather Fields for Typhoon Sanba (1216) (태풍 기상장의 신뢰도 분석: 태풍 산바(1216))

  • Kwon, Kab Keun;Jho, Myeong Hwan;Ryu, Kyong Ho;Yoon, Sung Bum
    • Journal of Korean Society of Coastal and Ocean Engineers
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    • v.32 no.6
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    • pp.465-480
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    • 2020
  • Numerical simulations of the storm surge and the wave induced by the Typhoon Sanba incident on the south coast of Korea in 2012 are conducted using the JMA-MSM forecast weather field, NCEP-CFSR reanalysis weather field, ECMWF-ERA5 reanalysis weather field, and the pressure and wind fields obtained using the best track information provided by JTWC. The calculated surge heights are compared with the time history observed at harbors along the coasts of Korea. For the waves the calculated significant wave heights are compared with the data measured using the wave buoys and the underwater pressure type wave gauge. As a result the JMA-MSM and the NCEP-CFSR weather fields give the highest reliability. The ECMWF-ERA5 gives in general surge and wave heights weaker than the measured. The ECMWF-ERA5, however, reproduces the best convergence belt formed in front of the typhoon. The weather field obtained using JTWC best track information gives the worst agreement.