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    王培濤,高義,于福江,范婷婷.基于數值模擬的渤海海域地震海嘯危險性定量化研究[J].海洋學報,2014,36(1):56-64
    基于數值模擬的渤海海域地震海嘯危險性定量化研究
    Quantitative research on earthquake-generated tsunami hazards based on the numerical simulations in Bohai Sea
    投稿時間:2012-02-08  
    DOI:10.3969/j.issn.0253-4193.2014.01.007
    中文關鍵詞:  渤海地震海嘯  數值模擬  四叉樹  海嘯預警
    英文關鍵詞:tsunamis in Bohai Sea  numerical simulation  quadtree  tsunami early warning
    基金項目:海洋公益性行業科研專項項目(201205034,201305031)。
    作者單位
    王培濤 National Marine Environment Forecasting Center, Beijing 100081, China 
    高義 Key Laboratory of Research on Marine Hazards Forecasting, National Marine Environmental Forecasting Center, State Oceanic Administration, Beijing 100081, China 
    于福江 National Marine Environment Forecasting Center, Beijing 100081, China
    Key Laboratory of Research on Marine Hazards Forecasting, National Marine Environmental Forecasting Center, State Oceanic Administration, Beijing 100081, China 
    范婷婷 National Marine Environment Forecasting Center, Beijing 100081, China 
    摘要點擊次數: 5385
    全文下載次數: 15416
    中文摘要:
          根據地震海嘯產生的條件,結合渤海海域的地形特征、地質構造、地震學特征和歷史地震及海嘯記錄對渤海海域潛在的地震海嘯進行了數值模擬研究。分析了渤??赡芤l地震海嘯的震源區域,討論了渤海發生海嘯災害的可能性。文中通過數值模擬再現了渤海歷史上幾次規模較大的地震事件可能引發的海嘯情景,研究分析了可能的地震海嘯在渤海及周邊海域的傳播過程及波動特征.地震海嘯傳播模型采用基于四叉樹原理的自適應網格加密技術,有效解決了局部分辨率與計算效率之間的矛盾。數值計算包括地震海嘯產生及傳播過程。利用該模型對渤海潛在的地震海嘯進行了數值計算,基于數值計算結果定量闡述了渤海海域潛在地震海嘯對渤海局部岸段及北黃海沿岸的影響,給出了渤??赡艿卣鸷[危險性劃分;研究結果將為我國海嘯危險性分析和海嘯預警技術研究工作提供技術支持。
    英文摘要:
          A numerical simulation study on potential earthquake-generated tsunami is carried out in the paper for Bohai Sea based on comprehensive consideration of the tsunamigenic conditions, topography feature, geological structure, seismological features and historical records about earthquake and tsunami. Tsunamigenic zones and possibility of tsunami hazards in Bohai Sea were analyzed and discussed respectively. Several local tsunamis were simulated by tsunami numerical model which was triggered by historical subduction earthquakes which have magnitudes larger than Mw7.0 in Bohai Sea. The tsunami model adopted adaptive mesh refinement technology based on Quadtree principle. The contradiction between the local resolution and the computational efficiency was resolved by using adaptive mesh. Numerical computation including seabed deformation,tsunami propagating over deep and shallow water. Potential tsunami induced by a hypothetical earthquake with Mw7.8 was simulated using tsunami numerical model in this paper. Its propagation scenario and wave characteristics were analyzed around Bohai Sea region. The impact of potential tsunami on Bohai Sea coasts and northern Huanghai Sea coasts was discussed quantitatively ground on the numerical calculation result. A preliminary tsunami hazards for Bohai Sea were classified. The study presented in this paper will serve as the technological support to the tsunami hazards analysis and the technology research of tsunami early warning.
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