A Universal Parameter to Predict Subaerial Landslide Tsunamis?

Journal of Marine Science and Engineering

Valentin Heller¹ 

[1] Department of Civil and Environmental Engineering, Imperial College London, London SW7 2AZ, UK

关键词: hazard assessment;    impulse wave;    landslide;    landslide tsunami;    physical modelling;    wave generation;   

DOI  :  10.3390/jmse2020400

来源: mdpi

【 摘 要 】

The significance of the impulse product parameter P is reviewed, which is believed to be the most universal parameter for subaerial landslide tsunami (impulse wave) prediction. This semi-empirical parameter is based on the streamwise slide momentum flux component and it was refined with a multiple regression laboratory data analysis. Empirical equations based on P allow for a simple prediction of wave features under diverse conditions (landslides and ice masses, granular and block slides, etc.). Analytical evidence reveals that a mass sliding down a hill slope of angle 51.6° results in the highest waves. The wave height “observed” in the 1958 Lituya Bay case was well predicted using P. Other real-world case studies illustrate how efficient empirical equations based on P deliver wave estimates which support hazard assessment. Future applications are hoped to further confirm the applicability of P to cases with more complex water body geometries and bathymetries.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.