4 research outputs found
The influence of landslide shape and continental shelf on landslide generated tsunamis along a plane beach
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
A second-order theory for wave energy converters with curved geometry
A second-order theory for wave energy converters with curved geometr
Extended mild-slope equations for compressible fluids
In this paper we derive new forms of the mildslope
equation (MSE) for water waves in a
weakly compressible fluid on a slowly varying
bathymetry, with surface and bottom disturbances.
The MSE is a powerful tool to model the
refraction-diffraction dynamics of water waves
propagating on a variable bathymetry [1]. Traditionally,
mild-slope models are derived by assuming
that the wave steepness is small, the fluid
is inviscid and incompressible and the motion
is irrotational. Furthermore, no disturbances
are normally considered both on the free surface
and at the bottom of the fluid domain [2]. In
this paper we shall find new expressions of the
MSE by relaxing the incompressibility hypothesis
and considering both surface and bottom disturbances.
We shall name the set of new formulae
as the extended acoustic-gravity mild-slope
equations (EAG-MSE). Such a system of equations
can be implemented in numerical models
for the early detection of coastal flooding based
on the hydro-acoustic precursors of surface gravity
waves (see [3]–[5])
Vaterländische Nachrichten.
Landslide generated tsunamis are lesser-known
yet equally destructive than earthquake tsunamis. Indeed,the highest tsunami wave recorded in recent history was generated by a landslide in Lituya Bay (Alaska, July 9, 1958)and produced runup in excess of 400 m. In this paper, we review the state of the art of landslide tsunami analytical modelling. Within the framework of a linearised shallowwater theory, we illustrate the dynamics of landslide tsunami
generation and propagation along beaches and around islands. Finally, we highlight some intriguing new directions in the analytical modelling of landslide tsunamis to support early warning systems