NHESS Natural Hazards and Earth System Sciences NHESS Nat. Hazards Earth Syst. Sci. 1684-9981 Copernicus Publications Göttingen, Germany 10.5194/nhess-12-1503-2012 The influence of landslide shape and continental shelf on landslide generated tsunamis along a plane beach Renzi E. 1 2 Sammarco P. 1 Università degli Studi di Roma Tor Vergata, Dipartimento di Ingegneria Civile, Via del Politecnico 1, 00133 Rome, Italy now at: UCD School of Mathematical Sciences, University College Dublin, Belfield, Dublin 4, Ireland 16 05 2012 12 5 1503 1520 Copyright: © 2012 E. Renzi 2012 This work is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/3.0/ This article is available from https://nhess.copernicus.org/articles/12/1503/2012/nhess-12-1503-2012.html The full text article is available as a PDF file from https://nhess.copernicus.org/articles/12/1503/2012/nhess-12-1503-2012.pdf

This work proposes an advancement in analytical modelling of landslide tsunamis propagating along a plane beach. It is divided into two parts. In the first one, the analytical two-horizontal-dimension model of Sammarco and Renzi (2008) for tsunamis generated by a Gaussian-shaped landslide on a plane beach is revised and extended to realistic landslide shapes. The influence of finiteness and shape of the slide on the propagating waves is investigated and discussed. In the second part, a new model of landslide tsunamis propagating along a semi-plane beach is devised to analyse the role of the continental platform in attenuating the wave amplitude along the shoreline. With these parameters taken into account, the fit with available experimental data is enhanced and the model completed.

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