气候变化领域集成服务门户(CCPortal): Semi-empirical predictive equations for the initial amplitude of submarine landslide-generated waves: applications to 1994 Skagway and 1998 Papua New Guinea tsunamis

CCPortal

DOI	10.1007/s11069-020-04050-4
	Semi-empirical predictive equations for the initial amplitude of submarine landslide-generated waves: applications to 1994 Skagway and 1998 Papua New Guinea tsunamis
	Sabeti R.; Heidarzadeh M.
发表日期	2020
ISSN	0921030X
起始页码	1591
结束页码	1611
卷号	103 期号:1
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).
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
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/205911
作者单位	Department of Civil and Environmental Engineering, Brunel University London, Uxbridge, UB8 3PH, United Kingdom
推荐引用方式 GB/T 7714	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],2020,103(1).
APA	Sabeti R.,&Heidarzadeh M..(2020).Semi-empirical predictive equations for the initial amplitude of submarine landslide-generated waves: applications to 1994 Skagway and 1998 Papua New Guinea tsunamis.Natural Hazards,103(1).
MLA	Sabeti R.,et al."Semi-empirical predictive equations for the initial amplitude of submarine landslide-generated waves: applications to 1994 Skagway and 1998 Papua New Guinea tsunamis".Natural Hazards 103.1(2020).