Achilleas Samaras

Achilleas Samaras
Democritus University of Thrace | DUTH · Department of Civil Engineering

Civil Engineer PhD

About

52
Publications
11,575
Reads
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445
Citations
Citations since 2016
27 Research Items
401 Citations
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20162017201820192020202120220204060
Introduction
I am Assistant Professor of Maritime Hydraulics, Port & Harbour Engineering at the Department of Civil Engineering in Democritus University of Thrace. I have a PhD in Civil Engineering from Aristotle University of Thessaloniki, where I also acquired my Diploma and MSc in Civil Engineering, both with "Honours" and as a Valedictorian. My research interests focus on coastal and ocean engineering, including a particular interest in the dynamics of coupled watershed-coast systems.
Additional affiliations
January 2014 - July 2015
Aristotle University of Thessaloniki
Position
  • Research Associate
December 2012 - November 2015
Alexander Technological Educational Institute of Thessaloniki
Position
  • Research Associate
November 2012 - December 2016
University of Bologna
Position
  • Research Associate
Education
January 2007
University of Porto
Field of study
  • First CoastLab Teaching School
October 2006 - October 2010
Aristotle University of Thessaloniki
Field of study
  • Civil Engineering
October 2005 - October 2006
Aristotle University of Thessaloniki
Field of study
  • Civil Engineering

Publications

Publications (52)
Article
Full-text available
The world’s coasts are being continuously reshaped by the interplay between natural- and human-induced pressures [...]
Article
Full-text available
In the present work, the impact of climate change on coastal flooding is investigated through a set of interoperable models developed by the authors, following a modular modelling approach and adapting the modelling sequence to two separate objectives with respect to inundation over large-scale areas and coastal protection structures’ design. The m...
Article
Full-text available
This work presents results on the simulation of the generation and propagation of ship-borne waves, using an advanced nonlinear dispersive wave model based on the higher order Boussinesq-type equations. The model includes a single frequency dispersion term, expressed through convolution integrals; it is adapted to represent ship-borne waves by adop...
Article
Coupled wave – 3D-hydrodynamics model runs are performed to investigate thermal discharge release to coastal areas by means of including nearshore effects of wave-current dynamics. The study area comprises the vicinity of a power plant at Cerano, in South Italy, where cooling industrial waters are released to the sea. The implemented model is calib...
Article
Full-text available
In the present work, an advanced tsunami generation, propagation and coastal inundation 2-DH model (i.e. 2-D Horizontal model) based on the higher-order Boussinesq equations – developed by the authors – is applied to simulate representative earthquake-induced tsunami scenarios in the Eastern Mediterranean. Two areas of interest were selected after...
Article
Full-text available
The present work aims at developing a hydraulic simulation model for the aqueducts of Thessaloniki city in Greece to model the current operating state of the network, as well as its response to emergency conditions resulting from failure in one of them. Hydraulic simulations performed using WaterGEMS software in an extended period simulation (EPS)...
Conference Paper
Full-text available
This work presents results on the simulation of the generation and propagation of ship-borne waves, using an advanced nonlinear dispersive wave model based on higher order Boussinesq-type equations. The model includes a single frequency dispersion term, expressed through convolution integrals; it is adapted to represent ship-borne waves by adopting...
Article
Full-text available
The evolution of coastal and transitional environments depends upon the interplay of human activities and natural drivers, two factors that are strongly connected and many times conflicting. The urge for efficient tools for characterising and predicting the behaviour of such systems is nowadays particularly pressing, especially under the effects of...
Article
Full-text available
This work presents the results of the numerical study implemented for the natural area of Lido di Spina, a touristic site along the Italian coast of the North Adriatic Sea, close to the mouth of River Reno. High-resolution simulations of nearshore dynamics are carried out under climate change conditions estimated for the site. The adopted modeling...
Conference Paper
In this work, the 2DH post-Boussinesq model of Karambas and Memos (2009) is tested in the generation and propagation of tsunami and ship-borne waves. Model results compare well with analytical solutions and physical experiments presented by Hammack (1973), Mitsotakis (2009) and David et al. (2017), highlighting the model’s accuracy and versatility.
Conference Paper
The term Watershed-Coast Systems (WACS), coined by Samaras and Koutitas (2014a), refers to the entities consisting of watersheds of rivers/natural streams and the areas adjacent to their outlets where sediment delivery from the upstream is critical for the balance of the coastal sediment budget, thus playing a key role in long-term evolution of coa...
Conference Paper
In the present work, an advanced numerical model based on the solution of the higher-order Boussinesq-type equations for breaking and non-breaking waves is applied in order to simulate the impact of climate change on coastal flooding. The model is tested against two-dimensional (cross-shore) experimental data by Roeber at al. (2010), and is afterwa...
Article
Full-text available
In the present work, an integrated coastal engineering numerical model is presented. The model simulates the linear wave propagation, wave-induced circulation, and sediment transport and bed morphology evolution. It consists of three main modules: WAVE_L, WICIR, and SEDTR. The nearshore wave transformation module WAVE_L (WAVE_Linear) is based on th...
Article
Full-text available
The present work describes an operational strategy for the development of a multiscale modeling system, based on a multiple-nesting approach and open-source numerical models. The strategy was applied and validated for the Gulf of Taranto in southern Italy, scaling large-scale oceanographic model results to high-resolution coupled wave–3-D hydrodyna...
Article
Full-text available
Numerical modelling has become an essential component of today's coastal planning, decision support and risk assessment. High-resolution modelling offers an extensive range of capabilities regarding simulated conditions, works and practices and provides with a wide array of data regarding nearshore wave dynamics and hydrodynamics. In the present wo...
Article
Full-text available
The present work describes an operational strategy for the development of a multiscale modelling system, based on a multiple–nesting approach and open–source numerical models. The strategy was applied and validated for the Gulf of Taranto in South Italy, scaling large–scale oceanographic model results to high–resolution coupled wave – 3D hydrodynam...
Article
Full-text available
Numerical modelling has become an essential component of today's coastal planning, decision support and risk assessment. High resolution modelling offers an extensive range of capabilities regarding simulated conditions, works and practices, and provides with a wide array of data regarding nearshore wave- and hydro-dynamics. In the present work, th...
Article
Full-text available
Oil spill models are used worldwide to provide preventive measures in assessing risks of actual and potential damage to natural resources from spills, and also in assisting coastal facilities and local authorities in their strategic development of oil spill mitigation planning and response. Numerous oil spill simulation models exist in the bibliogr...
Conference Paper
Full-text available
The present work investigates thermal discharge to coastal areas using TELEMAC-3D to simulate nearshore hydrodynamics, both standalone and coupled with TOMAWAC in order to include the effect of wave-current interactions as well. The study area is located in South Italy and comprises the vicinity of power plant at Cerano, near the city of Brindisi....
Article
Oil spills are a transnational problem, and establishing a common standard methodology for Oil Spill Risk Assessments (OSRAs) is thus paramount in order to protect marine environments and coastal communities. In this study we firstly identified the strengths and weaknesses of the OSRAs carried out in various parts of the globe. We then searched for...
Article
Full-text available
In the present work, an advanced tsunami generation, propagation and coastal inundation 2-DH model (i.e. 2-D Horizontal model) based on the higher-order Boussinesq equations – developed by the authors – is applied to simulate representative earthquake-induced tsunami scenarios in the Eastern Mediterranean. Two areas of interest were selected after...
Conference Paper
Full-text available
Coastal boulders transported inland by high-energy events, such as tsunamis or storms, have been found along several coastal areas worldwide. The importance of these deposits relies on their implications on coastal hazard assessment, since they contribute to the identification of past events and to the study of their magnitude and characteristics....
Article
Longshore sediment transport (LST) rate is the most essential quantity to be defined in shoreline evolution models. Intercomparisons of different formulae on the basis of laboratory or field measurements of LST rate values are commonly found in literature; however, examples of comparison based on long-term shoreline evolution observations are scarc...
Article
Beach nourishment is one of the worldwide most common soft shore protection methods. However, the design of these projects is usually based on empirical equations and rules, leaving large margins of error regarding their expected efficiency. In the present work, an advanced wave and sediment transport numerical model is developed and tested in the...
Article
Oil–shoreline interaction (or “beaching” as commonly referred to in literature) is an issue of major concern in oil spill modeling, due to the significant environmental, social and economic importance of coastal areas. The present work studies the improvement of the representation of beaching brought by the introduction of the Oil Holding Capacity...
Conference Paper
Full-text available
Oil spills pose a severe threat for the coastal and marine environment, due to their negative impact on ecosystems, habitats and human activities. Oil spill models simulate the processes that control the fate of oil spilled at sea and its interaction with different types of coasts (when attached to them), providing with estimates of the slick's tra...
Conference Paper
SOMMARIO Scopo di questo lavoro è presentare alla comunità scientifica italiana il progetto TESSA (http://tessa.linksmt.it/home) e le attività che il gruppo dell'Università di Bologna, insieme agli altri partner, quali CMCC e CNR-IAMC, sta conducendo all'interno di esso. Il TESSA (Programma PON 01_2823) "TEcnologie per la 'Situational Sea Awareness...
Article
Climate change is an issue of major concern nowadays. Its impact on the natural and human environment is studied intensively, as the expected shift in climate will be significant in the next few decades. Recent experience shows that the effects will be critical in coastal areas, resulting in erosion and inundation phenomena worldwide. In addition t...
Article
Coastal morphology evolves as the combined result of both natural- and human- induced factors that cover a wide range of spatial and temporal scales of effect. Areas in the vicinity of natural stream mouths are of special interest, as the direct connection with the upstream watershed extends the search for drivers of morphological evolution from th...
Conference Paper
Full-text available
Oil-shoreline interaction (or "beaching" as commonly referred in literature) is an issue of major concern in oil-spill modeling, due to the significant environmental, social and economic importance of coastal areas. The amount of oil that reaches and stays at the shore, as well as the temporal characteristics of the involved processes –in short– de...
Conference Paper
Full-text available
Wave and hydrodynamics modelling in coastal areas is nowadays an indispensable tool for both research and engineering/environmental design. The selection among the various available models is equally essential and should be done cautiously, taking into consideration both the models' capabilities and the actual modelling needs. In the above context,...
Article
Coastal areas are subject to various natural- and human-induced impacts affecting water quality and morphology evolution. Regarding the latter, its correlation with watershed processes is self-evident, as natural streams in many cases constitute the largest sediment source for the coastal environment. However, literature references that study concu...
Conference Paper
In the present work, the importance of watershed sediment modeling to coastal morphology is studied for a torrent watershed in Chalkidiki, North Greece. The impact of the land use changes that took place within the watershed on the overland and channel sediment transport, was simulated applying the SWAT model in GIS environment. SWAT was initially...
Conference Paper
In the present work, the impact of watershed processes to the coastal zone quality is studied for a typical sandy beach in the vicinity of a torrent mouth, located in Chalkidiki, North Greece. The shoreline evolution - attributed to the extensive land use changes in the upstream watershed - was studied using the numerical model PELNCON-M developed...
Article
Full-text available
The impact of catchment management on coastal morphology is studied in the present work, focusing on land cover changes and their effect on erosive phenomena. The study area is located in Chalkidiki, North Greece, and comprises the catchment of the Fourka Torrent and the area adjacent to its mouth. There, the shoreline retreat of about 35m (at the...
Article
Full-text available
Purpose ‐ To study the impact of River Nestos (North Greece) dams construction on coastal morphology. Design/methodology/approach ‐ In order to study the evolution of the coastal morphology in the area, an "one-line shoreline change model" was developed (PELNCON). The model's input comprises the field characteristics, the wave characteristics at th...
Conference Paper
Coastal morphology alterations at the Nestos River estuary are studied in the present work, due to the three large dams’ construction at the sites of Dospati in Bulgaria and Thisavros / Platanovrysi in Greece. The above mentioned interventions’ impact is estimated using the commercial software package CEDAS, along with the processing of satellite i...

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Projects (5)
Project
The Mediterranean region has been identified as one of the most responsive to climate change effects, featuring climate vulnerability hotspots such as deltas or urbanized coastal stretches. Along the Mediterranean there is a growing awareness of climatic impacts, supported by compelling evidence of relative sea-level rise, increasing flooding frequency and flash floods, changes in sea state, and meteocean regimes. These changes can be illustrated by extreme events such as the 2018 Medicane Zorbas or the 2020 Gloria storm, resulting in casualties and multimillion damages in the African and European coasts (Tunisia, Greece, Spain, France…) as well as important ecosystem shifts. Furthermore, the Mediterranean coast is characterized by a strong diversity in terms of morphological, hydrological, ecological, and socio-economic settings, giving rise to a complex mosaic of processes that hamper climate risk assessments and their projection, hindering an efficient adaptation. While advances in climate sciences have been providing important insight on the effects of climate change at the regional scale, the assessment of recent and current trends and the projection of future scenarios at local scales remain an open challenge. And yet downscaling the climate signal from regional to local domains is crucial for assessing climate-related hazards, impacts, and risks to underpin sound response and adaptation strategies. The proposed Research Topic aims at presenting and comparing climate change impacts on Mediterranean coastal and transitional areas from throughout the Mediterranean region. Papers on downscaled projections, impact estimations, and hazard/vulnerability assessments are addressed, together with traditional and “Nature-based Solutions” to mitigate climate-induced risks. The diversity of the Mediterranean coastal landscape and socio-economic conditions provides a great opportunity for sharing a common knowledge base and paradigmatic experiences representative of a variety of coastal and transitional systems where adaptation strategies can be discussed and compared. The resulting conclusions will benefit regional coastal systems and provide expertise applicable well beyond the Mediterranean geographical limits. Contributions to the proposed research topic may include (but are not limited to): • Assessment of recent trends of hydrological, hydrodynamic, morphodynamic, and ecological processes in coastal and transitional areas; • Physical and statistical downscaling of meteo-oceanic processes in climate change scenarios; • Adaptation, protection, and re-alignment under climate change for coastal and transitional areas; • Coastal structural design and classical interventions (e.g. nourishment) in a climate change context; • Innovative “Nature-based Solutions” for adaptation to climate change in a climate change context; • Policy frameworks for adaptation of coastal and transitional areas under climate change; • EU Directives and agreements for the sustainability of coastal and transitional areas under climate change; • Maintenance of “Nature-based Solutions” under climate change and economic crises; • Coastal social-ecological synergies to facilitate adaptation under climate change • Healthy coastal areas and transitional ecosystems to provide climate regulation service (e.g. Blue Carbon) More details can be found at the official Research Topic web page: https://www.frontiersin.org/research-topics/21455
Project
The world’s coasts are being continuously reshaped by the interplay between natural- and human-induced pressures. Projected climate change-driven variations in mean sea level, wave conditions and storm surges will add to the existing pressures, as already manifested by the effects of the presently observed climate variability on the frequency and intensity of extremes. Being the most heavily populated areas in the world, coastal zones host the majority and some of the most important human settlements, infrastructure and economic activities. Harbour and coastal structures are essential to the above, facilitating the transport of people and goods through ports, and protecting low lying areas against flooding and erosion. While based on relatively rigid concepts about service life in the past, nowadays, the design of these structures—or the upgrading of existing structures—should effectively proof them against future pressures, enhancing their resilience and long-term sustainability (i.e. their compliance to performance and operability criteria). In the above context, this Special Issue invites original scientific contributions on topics including: - Harbour and coastal structures design and upgrading (seawalls, revetments, bulkheads, jetties, emerged/submerged groins and breakwaters, artificial reefs, etc.). - Wave agitation and siltation problems in harbour basins and approach channels. - Shoreline erosion control downcoast of harbours. - Harbour layout design. Research articles, review articles and case studies are welcome; contributions can be based on numerical, physical or combined numerical and physical modelling. The deadline for manuscript submissions is set to November 20th, 2020. More information are available at: https://www.mdpi.com/journal/jmse/special_issues/model_harbour_coastal_struct The Special Issue flyer can be downloaded from: https://www.mdpi.com/journal/jmse/special_issue_flyer_pdf/model_harbour_coastal_struct/web
Project
Αγαπητοί φίλοι, βρίσκομαι στην ευχάριστη θέση να σας ανακοινώσω ότι η Ελληνική Υδροτεχνική Ένωση (Ε.Υ.Ε.) θα διοργανώσει το 14ο Συνέδριο της στις 16 και 17 Μαΐου 2019, στο Βόλο. Στη διοργάνωση του συνεδρίου συμμετέχουν το Τμήμα Γεωπονίας Ιχθυολογίας και Υδάτινου Περιβάλλοντος του Πανεπιστημίου Θεσσαλίας και το Τμήμα Πολιτικών Μηχανικών του Τ.Ε.Ι. Θεσσαλίας. Σκοπός του συνεδρίου είναι η παρουσίαση επίκαιρης έρευνας και εφαρμογών από επιστήμονες σχετικά με τη Διαχείριση Υδατικών Πόρων και την Προστασία του Περιβάλλοντος. Το συνέδριο θα φιλοξενηθεί στις εγκαταστάσεις της Σχολής Γεωπονικών Επιστημών του Πανεπιστημίου Θεσσαλίας. Περισσότερες πληροφορίες θα ανακοινωθούν σε επόμενα ενημερωτικά μηνύματα. Στο πλαίσιο του συνεδρίου θα βραβευθούν οι καλύτερες πτυχιακές και διπλωματικές εργασίες στην επιστήμη του Νερού, που εκπονήθηκαν στο διάστημα μεταξύ 9/2015 – 10/2018. Σας περιμένουμε να σας φιλοξενήσουμε στον όμορφο Βόλο και να ανταλλάξουμε επιστημονικές απόψεις. Dear Friends, I am pleased to announce that the Hellenic Hydrotechnical Union (E.Y.E.) will organize its 14th Conference. The conference will be co-organized by the Department of Ichthyology and Aquatic Environment of the University of Thessaly and the Department of Civil Engineering of TEI of Thessaly. The purpose of the Conference is to present research and applications by scientists on the areas of Water Resources Management and Environmental Protection. The conference will be hosted at the premises of the School of Agricultural Sciences of the University of Thessaly. More information will be announced in future newsletters. The conference will award the best graduate and diploma theses in Water Science, conducted between 9/2015 and 10/2018. We look forward to welcoming you to beautiful Volos and exchanging scientific opinions.