Optimal deployment of seafloor observation network for tsunami data assimilation in the South China Sea

被引:2
|
作者
Ren, Zhiyuan [1 ]
Wang, Yuchen [2 ]
Wang, Peitao [1 ]
Zhao, Xi [3 ]
Hu, Gui [4 ]
Li, Linlin [4 ,5 ]
机构
[1] Natl Marine Environm Forecasting Ctr, Beijing 100081, Peoples R China
[2] Japan Agcy MarineEarth Sci & Technol, Yokohama, Kanagawa 2360001, Japan
[3] Shanghai Jiao Tong Univ, Dept Engn Mech, MOE Key Lab Hydrodynam, Shanghai 200240, Peoples R China
[4] Sun Yat Sen Univ, Sch Earth Sci & Engn, Guangdong Prov Key Lab Geodynam & Geohazards, Guangzhou 510275, Peoples R China
[5] Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai 519082, Peoples R China
基金
中国国家自然科学基金; 日本学术振兴会;
关键词
South China Sea (SCS); Seafloor observation network (SON); Tsunami data assimilation; Tsunami early warning; Manila trench; HAZARD ASSESSMENT; COSEISMIC SLIP; EARTHQUAKE; SUBDUCTION; RECORDS; COAST;
D O I
10.1016/j.oceaneng.2021.110309
中图分类号
U6 [水路运输]; P75 [海洋工程];
学科分类号
0814 ; 081505 ; 0824 ; 082401 ;
摘要
We propose an optimal deployment scheme of the Seafloor Observation Network (SON) in the South China Sea (SCS), aiming at early warning of potential tsunami hazards based on the data assimilation approach. The SON is composed of offshore bottom pressure gauges (OBPGs). We design the initial location of OBPGs along the iso-baths of 500, 1000, and 2000 m. The energy distribution of the tsunami wavefield based on Empirical Orthogonal Function (EOF) analysis is used as a reference. Then, synthetic tsunamis generated by stochastic slip sources along the Manila Trench are adopted to evaluate the performance of the SON. The OBPGs at a depth of 1000 m can make an accurate early warning based on tsunami data assimilation at a reasonable engineering cost. Finally, based on the quantitative evaluation, the optimal deployment scheme of the SON is suggested. Our results indicate that at least three stations are required to cover the coast along southern China to forecast the tsunami in the SCS successfully. We note that our method could also be applied to other regions to design the SON against potential tsunami hazards.
引用
收藏
页数:10
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