A5002238692- Coastal and Marine Dynamics
- Ocean Waves and Remote Sensing
- Tropical and Extratropical Cyclones Research
- Coastal wetland ecosystem dynamics
- Coastal and Marine Management
- Oceanographic and Atmospheric Processes
- Flood Risk Assessment and Management
- Earthquake and Tsunami Effects
- Meteorological Phenomena and Simulations
- Aeolian processes and effects
National Technical University of Athens
2012-2025
Satways (Greece)
2021-2024
Coastal floods are regarded as among the most dangerous and harmful of all natural disasters affecting urban areas adjacent to shorelines. Rapid urbanization combined with climate change poor governance often results in significant increase flood risk, especially for coastal communities. Wave overtopping wave run-up key mechanisms monitoring flooding such, efforts currently focusing on their predicting. In this paper, an integrated methodology is proposed, accounting under extreme scenarios...
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...
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...
Ensuring sea surface tranquility within port basins is of paramount importance for safe and efficient operations vessels’ accommodation. The present study aims to introduce a robust numerical model based on mild-slope equations, capable accurately simulating wave disturbance resonance in ports. further enhanced by the integration an artificial neural network (ANN) address partial reflection, its efficiency optimized developing parallel algorithm OpenMP, allowing reduction required simulation...
Coastal areas are dynamic multidimensional systems challenged by the complex interactions between natural, environmental, and human-induced pressures, as well ever-changing climate. A comprehensive evaluation of their spatial temporal features enables development effective practices required to apply integrated coastal zone management (ICZM) policies. ICZM seeks address vulnerability in an attempt mitigate weaknesses increase resilience. Hence, assessment is a prerequisite proceed with...
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...
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...
The long-term prediction of morphological bed evolution has been interest to engineers and scientists for many decades. Usually, process-based models are employed simulate bed-level changes in the scale years To compensate major computational effort required by these models, various acceleration techniques have developed, namely input-reduction, model-reduction behaviour-oriented modelling. present paper presents a new input-reduction method obtain representative wave conditions based on...
Process-based models have been employed extensively in the last decades for prediction of coastal bed evolution medium term (1–5 years), under combined action waves and currents, due to their ability resolve dominant processes. Despite widespread application, they are associated with high demand computational resources, rendering annual a tedious task. To combat this, wave input reduction methods generally reduce sheer amount sea-states be simulated assess level changes. The purpose this...
The ability to reliably forecast sea states (most importantly level, wind and wave conditions) within or close the entrance of ports is a critical tool for all involved stakeholders. In this paper we present our work on prototype decision support system capable providing accurate state forecasts based three high-resolution hydrodynamic models, i.e. spectral model (model A), mild-slope equation B) barotropic circulation H). We an end novel data processing pipeline, handling challenges posed...
A simple, small array of a few elevation probes is proposed for the estimation wave directional spreading and mean direction. This technique offers possibility such estimations through two comparable methods, that is, Maximum Likelihood Method Entropy Method. It noted latter method was combined with an approximate technique, based on simple alternative calculation sea surface’s orthogonal slopes. The proved to work well in both methods’ applications laboratory modeled data. In summary, this...
In the present paper, a package model is derived, based on joint probability density function and Boussinesq-class numerical wave model. The key task was to produce estimates of wave-height period in intermediate shallow waters given respective information offshore. This paramount importance context design resilient coastal structures. approach followed includes an extension estimate images deep their decomposition into manageable data time series free surface elevation. These serve as input...
The simulation of wave propagation and penetration inside ports coastal areas is paramount importance to engineers scientists desiring obtain an accurate representation the field. However, this often a rather daunting task due complexity processes that need be resolved, as well demanding levels required computational resources. In present paper, enhancements made on existing sophisticated Boussinesq-type model, concerning generation irregular multidirectional waves, empirical methodology...
Numerical modeling of wave transformation, hydrodynamics, and morphodynamics in coastal regions holds paramount significance for combating erosion by evaluating optimizing various protection structures. This study aims to present an integration numerical models accurately simulate the processes with presence harbor Specifically, integrated employs advanced mild slope model as main driver, which is capable describing all transformation phenomena, including reflection. provides radiation...
Coastal flooding poses a significant threat to coastal communities, adversely affecting both safety and economic stability. This is exacerbated by factors such as sea level rise, rapid urbanization, inadequate infrastructure, noted in recent climate change reports. Early warning systems (EWSs) have proven be effective tools planning management, offering high cost-to-benefit ratio. Recent advancements integrated operational numerical models with machine learning techniques develop...
In this paper, a simple approach to determine representative offshore wave characteristics for estimating the annually averaged sedimentation and erosion trends in sandy coastal areas is presented. Given climate, proposed breaks down climate into fixed 22.5-degree bins based on sediment transport potential it determines equivalent each bin, i.e., significant height, peak period, mean direction, corresponding frequency of occurrence. The validated idealized cases uniformly sloping beaches...