DOI: 10.1007/s11069-020-04050-4
论文题名: Semi-empirical predictive equations for the initial amplitude of submarine landslide-generated waves: applications to 1994 Skagway and 1998 Papua New Guinea tsunamis
作者: Sabeti R. ; Heidarzadeh M.
刊名: Natural Hazards
ISSN: 0921030X
出版年: 2020
卷: 103, 期: 1 起始页码: 1591
结束页码: 1611
语种: 英语
中文关键词: Landslide
; Landslide-generated waves
; Papua New Guinea
; Tsunami
英文关键词: accuracy assessment
; amplitude
; empirical analysis
; equation
; mathematical analysis
; performance assessment
; prediction
; submarine landslide
; tsunami event
; vulnerability
; wave field
; wave generation
; Alaska
; Papua New Guinea
; Skagway
; United States
英文摘要: Accurate predictions of maximum initial wave amplitude are essential for coastal impact assessment of tsunami waves generated by submarine landslides. Here, we analyse the existing predictive equations for the maximum initial amplitude (ηmax) of submarine landslide-generated waves and study their performance in reproducing real-world landslide incidents. Existing equations include various landslide parameters such as specific gravity (γs), initial submergence (d), slide length (B), width (w), thickness (T) and slope angle (θ). To determine how landslide parameters affect wave amplitude, we conduct a systematic sensitivity analysis. Results indicate that the slide volume (V = B × w × T) and d are among the most sensitive parameters. The data from the 1994 Skagway (observed ηmax: 1.0–2.0 m) and 1998 Papua New Guinea (PNG) (observed ηmax: 10–16 m) incidents provided valuable benchmarks for evaluating the performance of the existing equations. The predicted maximum initial amplitudes of 0.03–686.5 m and 3.7–6746.0 m were obtained for the 1994 and 1998 events, respectively, indicating a wide range for wave amplitudes. The predicted estimates for the smaller-sized event, i.e. the 1994 Skagway, appear to be more accurate than those made for the larger event, i.e. the 1998 PNG case. We develop a new predictive equation by fitting an equation to actual submarine landslide tsunamis: ηmax=50.67(Vd)0.34, where V is the slide volume (km3), d is initial submergence depth (m), and ηmax is in metres. Our new equation gives wave amplitudes of 1.6 m and 7.8 m for the 1994 and 1998 landslide tsunamis, respectively, which are fairly consistent with real observations. © 2020, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/168710
Appears in Collections: 气候变化与战略
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作者单位: Department of Civil and Environmental Engineering, Brunel University London, Uxbridge, UB8 3PH, United Kingdom
Recommended Citation:
Sabeti R.,Heidarzadeh M.. Semi-empirical predictive equations for the initial amplitude of submarine landslide-generated waves: applications to 1994 Skagway and 1998 Papua New Guinea tsunamis[J]. Natural Hazards,2020-01-01,103(1)