A5013374521- Coastal and Marine Dynamics
- Ocean Waves and Remote Sensing
- Tropical and Extratropical Cyclones Research
- Coastal wetland ecosystem dynamics
- Oceanographic and Atmospheric Processes
- Wave and Wind Energy Systems
- Underwater Acoustics Research
- Fluid Dynamics Simulations and Interactions
- Geotechnical Engineering and Underground Structures
- Aeolian processes and effects
- Dam Engineering and Safety
- Geotechnical Engineering and Soil Stabilization
- Flood Risk Assessment and Management
- Geotechnical Engineering and Analysis
- Lattice Boltzmann Simulation Studies
- Ship Hydrodynamics and Maneuverability
- Fluid Dynamics and Heat Transfer
- Disaster Management and Resilience
- Underwater Vehicles and Communication Systems
- Earthquake and Tsunami Effects
- Seismic Waves and Analysis
- Environmental and Industrial Safety
- Hydrology and Watershed Management Studies
- Nonlinear Waves and Solitons
- Maritime and Coastal Archaeology
National Technical University of Athens
2013-2024
State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering
2013
Engineering (Italy)
2013
California Maritime Academy
2009
University of the Aegean
2009
American Society of Civil Engineers
2000
National Polytechnic School
1980
Imperial College London
1980
An experimental study carried out in a flume to scale of 1/20 is presented assess the wave height attenuation induced by submerged meadows Posidonia oceanica. After examination appropriate scaling laws and selection model material, an extensive test programme included both regular random waves. A semi-empirical formulation for estimating transformation along meadow obtained, based on energy conservation considering that dissipation only due drag forces. The latter were linearized obtain...
This paper presents a recently developed Operational Forecast Platform (OFP) for prevailing sea conditions at very important ports worldwide (Accu-Waves). The OFP produces reliable high-resolution predictions of wave characteristics in and around ocean ports. Its goal is to support safer navigation, predict possible port downtime, assist vessel approaching, enhance management towing services, bolster secure ship maneuvering busy the globe. Accu-Waves based on integrated, modelling over...
In the present work a new Boussinesq dispersive wave propagation model is proposed. The based on system of equations expressed in terms free-surface elevation and depth-averaged horizontal velocities. approach developed for fully weakly nonlinear irregular waves propagating over any constant water depth two dimensions, but it can also be applied mildly sloping beaches with considerable accuracy. its two-dimensional formulation involves total five each momentum equation, including classical...
Coastal storms as extreme hydrometeorological events have severe impacts on the coasts and consequently affect coastal communities, attracting considerable research interest nowadays. Attempting to understand risk of these events, a storm analysis is accomplished by studying parameters which define their properties, such wave height, period, duration, calm energy. The frequency occurrence storms, thresholds way they are interrelating with each other draw rough outline climate during for...
An integrated methodological approach to the development of a coastal flood early-warning system is presented in this paper improve societal preparedness for events. The consists two frameworks, namely Hindcast Framework and Forecast Framework. aim former implement suite high-credibility numerical models validate them according past flooding events, while latter takes advantage these validated runs plethora scenarios representing distinct sea-state events train an Artificial Neural Network...
A two-dimensional high-order Boussinesq-type model was derived to simulate wave propagation and relevant processes in the nearshore zone. Because of its enhanced nonlinear character, can describe more accurately amplitude dispersion compared weakly counterpart. Extension surf zone accomplished using eddy-viscosity concept for simulating breaking waves. Swash-zone dynamics were simulated by applying a modified narrow-slot technique. Bottom friction subgrid turbulent mixing also incorporated....
A two horizontal dimensional compound model is developed to simulate coastal sediment transport and bed morphology evolution due wave action. The module a higher-order Boussinesq-type model. load in the surf zone computed from an advanced semi-empirical formula while suspended can be calculated through solution of advection-diffusion equation for or alternatively simplified formula. estimation swash based on ballistic theory. unified valid under combined waves currents including asymmetry...
This study focuses on the prediction of technical efficiency narrow-crested submerged permeable rubble-mound breakwaters, in terms wave attenuation. A number existing formulae for estimating transmission coefficient breakwaters can be found literature, whereas this work further improvement that estimation has been achieved mainly through physical modelling. series 2D experiments under scale were conducted regular and random waves providing data respective breaking characteristics....
Three enhanced versions of two existing nonlinear Boussinesq-type models are herein derived. These models, along with other similar solvers, were investigated respect to their and dispersive characteristics. In particular, this study comprises Fourier analysis at first-order, second-order, third-order harmonics; an investigation linear dispersion; shoaling analysis; estimation transfer functions for subharmonics superharmonics. The also validated against demanding experimental tests wave...
Rubble-mound breakwaters are subject not only to wave action but, also, other types of environmental loading, such as earthquakes. High seismic activity combined with soft foundation soil can lead large settlements and even failures these structures. This paper reports on some aspects the investigation undertaken study behaviour rubble-mound under loading. The comprised physical mathematical modeling two breakwaters: first one sitting a rigid bed, second yielding base loose sand. Input...
A recent Boussinesq-type model is herein modified to account for breaking waves in shallow water. The based on a system of equations terms surface elevation and depth-averaged horizontal velocities, two dimensions fully dispersive weakly nonlinear random over any finite water depth. formulation involves five each momentum equation, including the classical shallow-water equation terms, only one frequency dispersion term. This work extends by depth-induced wave-breaking dimension, eddy...