• Title/Summary/Keyword: Tsunami inundation

Search Result 51, Processing Time 0.019 seconds

Practical Construction of Tsunami Inundation Map Corresponding to Disaster Forecast/Warning Systems (지진해일 예경보에 따른 범람도의 실용적 작성)

  • Jeon, Young-Joon;Choi, Jun-Woo;Yoon, Sung-Bum
    • 한국방재학회:학술대회논문집
    • /
    • 2008.02a
    • /
    • pp.775-778
    • /
    • 2008
  • In general, forecast tsunami heights announced for tsunami warning are computed by using a linear tsunami model with coarse grids which leads the underestimation of inundation area. Thus, an accurate tsunami inundation map corresponding to the forecast tsunami height is indispensible for an emergency evacuation plan. A practical way to construct a relatively accurate tsunami inundation map was proposed in this study for the quantitative forecast of inundation area. This procedure can be introduced as in the followings: The fault dislocations of potential tsunami sources generating a specific tsunami height near an interested area are found by using a linear tsunami model. Based on these fault dislocations, maximum inundation envelops of the interested area are computed and illustrated by using nonlinear inundation numerical model. In this study, the tsunami inundation map for Imwon area was constructed according to 11 potential tsunami sources, and the validity of this process was examined.

  • PDF

Practical Construction of Tsunami Inundation Map to Link Disaster Forecast/Warning and Prevention Systems (예경보와 방재시스템의 연계를 위한 지진해일 범람도의 실용적 작성)

  • Choi, Jun-Woo;Kim, Kyung-Hee;Jeon, Young-Joon;Yoon, Sung-Bum
    • Journal of Korean Society of Coastal and Ocean Engineers
    • /
    • v.20 no.2
    • /
    • pp.194-202
    • /
    • 2008
  • In general, forecast tsunami heights announced for tsunami warning are computed by using a linear tsunami model with coarse grids which leads the underestimation of inundation area. Thus, an accurate tsunami inundation map corresponding the forecast tsunami height is needed for an emergency evacuation plan. A practical way to construct a relatively accurate tsunami inundation map was proposed in this study for the quantitative forecast of inundation area. This procedure can be introduced as in the followings: The fault dislocations of potential tsunami sources generating a specific tsunami height near an interested area are found by using a linear tsunami model. Based on these fault dislocations, maximum inundation envelops of the interested area are computed and illustrated by using nonlinear inundation numerical model. In this study, the tsunami inundation map for Imwon area was constructed according to 11 potential tsunami sources, and the validity of this process was examined.

Study on evacuation simulation for tsunami using the characteristics of Imwon Port (임원항의 지형특성을 고려한 지진해일 피난 수치모형 연구)

  • Kim, Sung-Min;Sim, Joo-Yeol;Cho, Young-Sik
    • 한국방재학회:학술대회논문집
    • /
    • 2008.02a
    • /
    • pp.221-223
    • /
    • 2008
  • It is the best way that to make an inundation map and distribute it to inhabitants for the purpose of decreasing damage of tsunami. To make an inundation map, tsunami which broughthuge damage to Korea should be properly investigated and maximum inundation zonewas selected by simulating tsunami phenomenan. An inundation map must involve the location of shelters and evacuation routes. New evacuation simulation program connected evacuation simulation procedure and tsunami inundation procedure to get inhabitants' evacuation states in real-time.

  • PDF

Inundation Map at Imwon Port with Past and Virtual Tsunamis (과거 및 가상 지진해일에 의한 임원항의 침수예상도)

  • Kim, Tae-Rim;Cho, He-Rin;Cho, Yong-Sik
    • Journal of the Earthquake Engineering Society of Korea
    • /
    • v.21 no.1
    • /
    • pp.1-9
    • /
    • 2017
  • The scale of disaster and damage witnessed in the 2004 Indian Ocean Tsunami and the 2011 Great East Japan Tsunami has motivated researchers in developing foolproof disaster mitigation techniques for safety of coastal communities. This study focuses on developing tsunami hazard map by numerical modeling at Imwon Port to minimize losses of human beings and property damage when a real tsunami event occurs. A hazard map is developed based on inundation maps obtained by numerical modeling of 3 past and 11 virtual tsunami cases. The linear shallow-water equations with manipulation of frequency dispersion and the non-linear shallow-water equations are employed to obtain inundation maps. The inundation map gives the maximum extent of expected flooded area and corresponding inundation depths which helps in identifying vulnerable areas for unexpected tsunami attacks. The information can be used for planning and developing safety zones and evacuation structures to minimize damage in case of real tsunami events.

Effects of tsunami waveform on overtopping and inundation on a vertical seawall (직립호안에서 지진해일 파형이 월파와 침수에 미치는 영향)

  • Lee, Woodong;Kim, Jungouk;Park, Jongryul;Hur, Dongsoo
    • Journal of Korea Water Resources Association
    • /
    • v.51 no.8
    • /
    • pp.643-654
    • /
    • 2018
  • In order to generate the stable tsunami in a numerical wave tank, a two-dimensional numerical model, LES-WASS-2D has been introduced the non-reflected wave generation system for various tsunami waveforms. And then, comparing to existing experimental results it is revealed that computed results of the LES-WASS-2D are in good agreement with the experimental results on spatial and temporal tsunami waveforms in the vicinity of a seawall. It is shown that the applied model in this study is applicable to the numerical simulations on tsunami overtopping and inundation. Using the numerical results, the characteristics of overtopping and inundation on a seawall are also discussed with volume ratio of tsunami and relative tsunami height. The wider the tsunami waveform, tsunami overtopping quantity and inundation distances are linearly increased. Therefore, the hydraulic characteristics is highly likely to be underestimated against the real tsunami if the solitary wave of approximation theory is applied for the overtopping/inundation simulations due to a tsunami.

Construction of Tsunami Inundation Map for Real-Time Quantitative Response (실시간 정량 대응을 위한 지진해일 침수예상도 작성)

  • Bae, Jae-Seok;Yoon, Sung-Bum
    • Journal of Korean Society of Coastal and Ocean Engineers
    • /
    • v.22 no.5
    • /
    • pp.287-294
    • /
    • 2010
  • In this study, a method to construct tsunami inundation map corresponding to the earthquake location and magnitude was proposed for tsunami real-time quantitative response. This proposed procedure can be introduced as in the followings: Potential tsunami source locations expected to cause damage in an interested area was identified. And numerical simulations were performed for various earthquake magnitudes. Based on numerical simulation results, inundation maps were constructed according to each source location and magnitude of tsunami generating earthquake. In this study, inundation maps for Imwon harbor were constructed for the 11 source locations and 7 earthquake magnitudes on a trial basis.

A Tsunami Simulation Model based on Cellular Automata for Analyzing Coastal Inundation: Case Study of Gwangalli Beach (지진해일로 인한 해안 침수 분석을 위한 셀 오토마타 기반의 시뮬레이션 모델 개발: 광안리 해변 사례 연구)

  • Joo, Jae Woo;Joo, Jun Mo;Kim, Dong Min;Lee, Dong Hun;Choi, Seon Han
    • Journal of Korea Multimedia Society
    • /
    • v.23 no.5
    • /
    • pp.710-720
    • /
    • 2020
  • Tsunami occurred by a rapid change in the ocean floor is a natural disaster that causes serious damage worldwide. South Korea seems to be out of the range of this damage, but it is quite possible that South Korea will fall within the range due to the long-distance propagation features of tsunami and many earthquakes occurred in Japan. However, the analysis and preparation for tsunami have been still insufficient. In this paper, we propose a tsunami simulation model based on cellular automata for analyzing coastal inundation. The proposed model calculates the range of inundation in coastal areas by propagating the energy of tsunami using the interaction between neighboring cells. We define interaction rules and algorithms for the energy transfer and propose a software tool to effectively utilize the model. In addition, to verify and tune the simulation model, we used the actual tsunami data in 2010 at Dichato, Chile. As a case study, the proposed model was applied to analyze the coastal inundation according to tsunami height in Gwangali Beach, a famous site in Busan. It is expected that the simulation model can be a help to prepare an effective countermeasure against tsunami and be used for a virtual evacuating training.

Three-Dimensional Laboratory Experiments for Tsunami Inundation in a Coastal City (지진해일 범람이 해안도시에 미치는 영향에 대한 3차원 수리모형실험)

  • Kim, Kyuhan;Park, Hyoungsu;Shin, Sungwon;Cox, Daniel T.
    • Journal of Korean Society of Coastal and Ocean Engineers
    • /
    • v.24 no.6
    • /
    • pp.400-403
    • /
    • 2012
  • Laboratory experiments were conducted for tsunami inundation to an urban area with large building roughness. The waterfront portion of the city of Seaside which is located on the US Pacific Northwest coast, was replicated in 1/50 scale in the wave basin. Tsunami heights and velocities on the inundated land were measured at approximately 31 locations for one incident tsunami heights with an inundation height of approximately 10 m (prototype) near the shoreline. The inundation pattern and speed were more severe and faster in some areas due to the arrangement of the large buildings. Momentum fluxes along the roads were estimated using measure tsunami inundation heights and horizontal fluid velocities. As expected, the maximum momentum flux was near the shoreline and decreased landward. Inundation heights and momentum flux were slowly decreased through the road with buildings on each side. The results from this study showed that the horizontal inundation velocity is an important factor for the external force of coastal structures.

Analysis of the Tsunami Inundation Trace and it's Expectation Area in Coast Using GIS (GIS를 이용한 지진해일시 연안의 침수 흔적 및 예상 지역 분석)

  • Lee Hyung-Seok
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
    • /
    • v.24 no.2
    • /
    • pp.175-182
    • /
    • 2006
  • The efficient management for minimum losses and demage precautions of fragile region against coastal disasters such as seismic waves and seawater overflows is proceeding continually. This study is to analyze inundation trace and extract expected damage areas with historic records of tsunami using Geographic Information System. Creating a digital elevation model of the Mangsang and the Nobong region in the east coast, we marked inundation record of tsunami and forecasted the flood area with a seismic wave height between 3 m and 5 m. The inundation trace layers and the expected damage areas on the cadastral map layer were superimposed individually. Consequently, the range and lot numbers of inundation expected area were calculated and inundation areas of 5 m tsunami were increased by 2.8 times than 3 m tsunami in case of subject regions. Analyzed results are expected to use evacuation work in case of seismic waves and to predict the compensation of the damaged area. And this study is expected to use suitable countermeasure for prevention from natural disasters.

A Study of Inundation Mapping by Imagination Tsunami Simulation (가상 지진해일 시뮬레이션을 통한 최대범람지도 제작에 관한 연구)

  • Um, Dae-Yong;Yoon, Hee-Cheon;Park, Joon-Kyu;Kim, Min-Gyu
    • Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
    • /
    • 2007.04a
    • /
    • pp.261-264
    • /
    • 2007
  • In this study, I wished to forecast damage district by tsunami's occurrence. For this, analyzed tsunami that can happen in our country's neighborhood sea area using past data, and established tsunami's scenario by imagination with analysis result. I created 3D topographical model about study area and analyzed inundation area by achieving simulation by scenario. Also, result of simulation does overlay with digital map and manufactured imagination inundation map. This study result may offer as basic data for operation of tsunami's forecast/alarm system and making of disaster prevention policy.

  • PDF