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Hydrodynamic Simulation of the Pagasitikos Gulf, greece

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Computational Water, Energy, and Environmental Engineering 2024年第1期13卷 58-85页

作者： George Bousbouras Panagiotis Angelidis Division of Hydraulics Department of Civil Engineering School of Engineering Democritus University of Thrace Kimmeria Campus Xanthi Greece

Semi-enclosed sea basins have difficulty in recharging their waters due to limited communication with larger water bodies, with understandable consequences for their environmental status. This paper aims at the computational simulation of the hydrodynamic characteristics of the waters of the Pagasitikos Gulf (greece), which has limited communication and water exchange with the Aegean Sea and is subject to intense environmental pressures The Estuary, Lake & Coastal Ocean 3d hydrodynamic Model (ELCOM 2.2) combined with its later version Aquatic Ecosystem Model-3d (AEM3D) were used for the simulation. The simulation included the topography of the area, the bay’s bottom geometry, atmospheric loadings, tides, the influence of the Coriolis force and boundary conditions. The hydrodynamic behaviour of the bay, water circulation, velocities at the surface and in depth, water recharge and residence time throughout the bay, density variation and other factors were examined to determine the impact of all these on the aquatic ecosystem.

关键词： Hydrodynamic Simulation Semi-Enclosed Sea Basins Pagasitikos Gulf greece

Multi-Criteria Wildfire Risk Hazard Assessment in GIS Environment: Projection for the Future and Impact on RES Projects Installation Planning

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Journal of Geoscience and Environment Protection 2024年第5期12卷 242-265页

作者： Aggelos Pallikarakis Flora Konstantopoulou EXERGIA S.A. Climate Change Consultants Athens Greece

It is alarming for the fact that Wildfires number, severity and consequently impact have significantly increased during the last years, an aftermath of the Climate Change. One of the most affected areas worldwide is Mediterranean, due to the unique combination of its type of vegetation and demanding climatic conditions. This research is focused on the Region of Epirus in greece, an area with significant natural vegetation and a range of geomorphological aspects. In order to estimate the Wildfire Risk Hazard, several factors have been used: geomorphological (slope, aspect, elevation, TWI, Hydrographic network), social (Settlements and landfils, roads, overhead lines and substations), environmental (land cover) and climatic (Fire Weather Index). Through a multi-criteria decision analysis (MCDA) and an analytic hierarchy process (AHP) in a GIS environment, the Wildfire Risk Hazard has been estimated not only for current conditions but also for future projections for the near future (2031-2060) and the far future (2071-2100). The selected case study includes the potential impact of the Wildfires to the installed (or targeted to be installed) RES projects in the studied region.

关键词： RES Projects greece Epirus Analytic Hierarchy Process Multi-Criteria Decision Analysis

Medical transportation and the contribution of air medical evacuation in isolated mountainous areas of greece-Case study,Municipality of Agrafa

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Journal of Mountain Science 2022年第11期19卷 3178-3191页

作者： Ioanna KARANI Anastasios BALASKAS Dimitris KALIAMPAKOS School of Rural Surveying and Geoinformatics EngineeringNational Technical University of AthensAthens 15780Greece School of Mining and Metallurgical Engineering National Technical University of AthensAthens 15780Greece Metsovion Interdisciplinary Research Center National Technical University of AthensAthens 15780Greece

In every emergency medical situation,access to emergency medical services is an inalienable right of any citizen.The average acceptable time to provide first aid assistance is 60 minutes.In this paper,the possibility of using helicopters for air travel in mountainous areas was examined for the first time for all of greece and especially for a mountainous and isolated area such as the Municipality of Agrafa.Initially,the time distance-virtual distance,from the hospitals was calculated at the national level of greece,with an acceptable first contact time of 60 minutes(golden hour),i.e.,less than two hours from the nearest hospital to the incident and back to the hospital and the relevant conclusions are drawn.Then,the case study of Municipality of Agrafa,one of the most mountainous areas in greece,was examined.The time distance of the settlements from the nearest primary health point,namely the Primary Health Centre(PHC)of West Fragkista,was calculated and the transportation by ground means was compared with the corresponding time by flying means,to investigate the contribution of air transportation or not,of the timely arrival of the patients in the appropriate health structure.Finally,possible helicopter landing locations were identified,using a geographic information system to facilitate the process of air medical transportation in the Municipality of Agrafa.

关键词： Civil air transport Mountain areas Landing sites Travel time greece

Revisiting the determination of Mount Olympus Height(greece)

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Journal of Mountain Science 2023年第4期20卷 1026-1034页

作者： Dimitrios AMPATZIDIS Georgios MOSCHOPOULOS Antonios MOURATIDIS Michael STYLLAS Alexandros TSIMERIKAS Vasileios-Klearchos DELIGIANNIS Nikolaos VOUTSIS Triantafyllia-Maria PERIVOLIOTI Georgios S.VERGOS Alexandra PLACHTOVA Genie Lab Department of Surveying and Geoinformatics EngineeringInternational Hellenic UniversityTerma Magnisias62124SerresGreece EO.Lab Department of Physical&Environmental Geography Aristotle University54124ThessalonikiGreece Geoservice LTD Eirinis 14 Str55236ThessalonikiGreece Nomotechniki Pierias Dim.Dimadi 560100KateriniGreece Paths of greece Karneadou 34-36Athens10676Greece Laboratory of Gravity Field Research and Applications-GravLab Aristotle University of Thessaloniki University Box 44054124ThessalonikiGreece Faculty of Science Department of Applied Geoinformatics and Cartography Charles UniversityAlbertov 612843Praha 2Czechia Balkan Center Center for Interdisciplinary Research and Innovation(CIRI-AUTH)AUTH Campus54124ThessalonikiGreece

The present study deals with the determination of Mount Olympus summit(Mytikas),exploiting modern observations such as Global Navigation Satellite Systems(GNSS)and existing geodetic information.The last official Olympus height determination goes back 102 years by the Swiss surveyor M.Kurz.Since then,only unofficial measurement campaigns have taken place.There is a variety of released heights,which range from 2917 to 2919 meters.In September and October of 2022,we conducted a GNSS campaign,focusing on the area of highest Olympus peaks.Employing precise GNSS measurements(accuracy of 1-3 cm),in conjunction with height information from greece’s National Triangulation Network(5-10 cm accuracy)and an appropriate,recent geoid model(5-6 cm accuracy),we estimate through the so-called GNSS-levelling,the height of Olympus to 2917.727 m with respect to greece’s officially accepted mean sea level and 2918.390 m with respect to the global vertical datum.Our estimation of Olympus highest peak shows remarkable consistency at the level of 12.8 cm to that of M.Kurz in 1921.

关键词： Olympus greece Mountain height determination GNSS leveling Surveying

Homogenised Monthly and Daily Temperature and Precipitation Time Series in China and greece since 1960

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Advances in Atmospheric Sciences 2023年第7期40卷 1326-1336页

作者： Athanassios A.ARGIRIOU Zhen LI Vasileios ARMAOS Anna MAMARA Yingling SHI Zhongwei YAN Laboratory of Atmospheric Physics Department of PhysicsUniversity of PatrasRio 26504Greece Key Laboratory of Regional Climate-Environment in Temperate East Asia Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Hellenic National Meteorological Service Athens 16777Greece Longyang District Meteorological Service Baoshan 678007China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China

In this paper,we describe and analyze two datasets entitled“Homogenised monthly and daily temperature and precipitation time series in China during 1960–2021”and“Homogenised monthly and daily temperature and precipitation time series in greece during 1960–2010”.These datasets provide the homogenised monthly and daily mean(TG),minimum(TN),and maximum(TX)temperature and precipitation(RR)records since 1960 at 366 stations in China and 56stations in greece.The datasets are available at the Science Data Bank repository and can be downloaded from https://***/10.57760/sciencedb.01731 and https://***/10.57760/sciencedb.01720.For China,the regional mean annual TG,TX,TN,and RR series during 1960–2021 showed significant warming or increasing trends of 0.27℃(10 yr)^(-1),0.22℃(10 yr)^(-1),0.35℃(10 yr)^(-1),and 6.81 mm(10 yr)-1,respectively.Most of the seasonal series revealed trends significant at the 0.05level,except for the spring,summer,and autumn RR series.For greece,there were increasing trends of 0.09℃(10 yr)-1,0.08℃(10 yr)^(-1),and 0.11℃(10 yr)^(-1)for the annual TG,TX,and TN series,respectively,while a decreasing trend of–23.35 mm(10 yr)^(-1)was present for RR.The seasonal trends showed a significant warming rate for summer,but no significant changes were noted for spring(except for TN),autumn,and winter.For RR,only the winter time series displayed a statistically significant and robust trend[–15.82 mm(10 yr)^(-1)].The final homogenised temperature and precipitation time series for both China and greece provide a better representation of the large-scale pattern of climate change over the past decades and provide a quality information source for climatological analyses.

关键词： daily and monthly temperature precipitation homogenisation climate time series greece China

Changing landscape in living kidney donation in greece

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World Journal of Transplantation 2023年第2期13卷 28-35页

作者： Nikolaos Karydis Ioannis Maroulis Department of General Surgery and Transplantation University of PatrasPatras 26504Greece Department of General Surgery University of PatrasPatras 26504Greece

Patients with end-stage renal disease in greece are facing long waiting times to receive a kidney transplant from a deceased donor.Living kidney donation offers a valuable alternative that provides optimal outcomes and significantly expands the donor pool but still remains relatively underutilised.Developments around the world in the field of kidney transplantation mandate a change in current practice to include additional options for living donation through paired exchange,antibody-incompatible transplantation and other strategies,following careful consideration of the cultural and ethical factors involved in these complex clinical decisions.An increase in living donation rates may be achieved in several ways,including targeted campaigning to overcome potential barriers.Educating clinicians on transplantation will prove as equally important as informing patients and prospective donors but requires training and resources.Adoption of established practices and implementation of new strategies must be tailored to the needs of the Greek donor and recipient population.Local beliefs about donation,perception of associated risk and other social characteristics must be considered in the design of future strategies.Facilitating living donation in a safe environment with appropriate donor and recipient education will form the solid foundation of a new era of kidney transplantation in greece.

关键词： Living kidney donation Paired exchange Incompatible transplantation Unrelated donors greece

Clinical presentation and outcomes of chronic dialysis patients with COVID-19:A single center experience from greece

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World Journal of Nephrology 2022年第2期11卷 58-72页

作者： Dimitra Bacharaki Minas Karagiannis Aggeliki Sardeli Panagiotis Giannakopoulos Nikolaos Renatos Tziolos Vasiliki Zoi Nikitas Piliouras Nikolaos-Achilleas Arkoudis Nikolaos Oikonomopoulos Kimon Tzannis Dimitra Kavatha Anastasia Antoniadou Demetrios Vlahakos Sophia Lionaki Nephrology Unit Department of Internal Medicine"Attikon"University HospitalChaidari 12462Greece Medical School National and Kapodistrian University of AthensAthens 15772Greece Department of Internal Medicine "Attikon"University HospitalChaidari 12462Greece Department of Radiology "Attikon"University HospitalChaidari 12462Greece

BACKGROUND Coronavirus disease 2019(COVID-19)is still a menacing pandemic,especially in vulnerable patients.Morbidity and mortality from COVID-19 in maintenance hemodialysis(MHD)patients are considered worse than those in the general population,but vary across continents and countries in Europe.AIM To describe the clinical course and outcomes of hospitalized MHD patients with COVID-19 in a retrospective observational single center study in greece.METHODS We correlated clinical,laboratory,and radiological data with the clinical outcomes of MHD patients hospitalized with COVID-19 during the pandemic.The diagnosis was confirmed by real-time polymerase chain reaction.Outcome was determined as survivors vs non-survivors and“progressors”(those requiring oxygen supplementation because of COVID-19 pneumonia worsening)vs“non-progressors”.RESULTS We studied 32 patients(17 males),with a median age of 75.5(IQR:58.5-82)years old.Of those,12 were diagnosed upon screening and 20 with related symptoms.According to the World Health Organization(WHO)score,the severity on admission was mild disease in 16,moderate in 13,and severe in 3 cases.Chest computed tomography(CT)showed 1-10%infiltrates in 24 patients.Thirteen“progressors”were recorded among included patients.The case fatality rate was 5/32(15.6%).Three deaths occurred among“progressors”and two in“non-progressors”,irrespective of co-morbidities and gender.Predictors of mortality on admission included frailty index,chest CT findings,WHO severity score,and thereafter the increasing values of serum LDH and D-dimers and decreasing serum albumin.Predictors of becoming a“progressor”included increasing number of neutrophils and neutrophils/lymphocytes ratio.CONCLUSION Patients on MHD seem to be at higher risk of COVID-19 mortality,distinct from the general population.Certain laboratory parameters on admission and during follow-up may be helpful in risk stratification and management of patients.

关键词： COVID-19 SARS-CoV-2 Dialysis greece Clinical course Outcome

The Villafranchian carnivoran guild of greece:implications for the fauna,biochronology and paleoecology

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Integrative Zoology 2014年第4期9卷 444-460页

作者： George D.KOUFOS Department of Geology Aristotle University of ThessalonikiThessalonikiGreece

Knowledge on the Villafranchian faunas of greece was limited for a long time,but over the past 3 decades several new fossiliferous sites have been discovered and new material has been unearthed.The carnivores constitute a remarkable part of this material and their study has provided useful information for the taxonomy,chronology and palaeoecology.The Villafranchian carnivoran guild includes numerous taxa belonging to various families.Some of them are interesting as they are differentiated from the other Eurasian families.They cover the entire Villafranchian but the mass is known from the Middle to the Epi-Villafranchian(EVC).Despite the discontinuous data,they provide useful biochronological results.The coexistence of Pliocrocuta perrieri and Pachycrocuta brevirostris in the locality of Gerakarou 1 is strong evidence for the Middle Villafranchian(MVC)/Late Villafranchian(LVC)boundary.The composition of the Villafranchian carnivores suggests that the canids predominate,while the felids,hyenids and mustelids are well represented;the ursids are represented by a single taxon,the well-known Ursus etruscus,which seems to be common during the entire Villafranchian.The carnivoran guild structure and the multivariate analysis of the Greek Villafranchian carnivoran assemblages(MVC,LVC and EVC)in comparison with modern assembalges from open and closed environments indicate a relatively open landscape,which is in agreement with previous results for the Villafranchian of greece.During the EVC there is a faunal renewal that is related to a more open and dry environment,like savannah bushland/grassland.

关键词： biochronology carnivore greece paleoecology Villafranchian

Integrated Assessment of Natural Hazards, Including Climate Change’s Influences, for Cultural Heritage Sites: The Case of the Historic Centre of Rethymno in greece

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International Journal of Disaster Risk Science 2019年第3期10卷 343-361页

作者： Mohammad Ravankhah Rosmarie de Wit Athanasios V.Argyriou Angelos Chliaoutakis Maria Joao Revez Joern Birkmann Maja Zuvela-Aloise Apostolos Sarris Anastasia Tzigounaki Kostas Giapitsoglou Institute of Spatial and Regional Planning(IREUS-Institut fur Raumordnung und Entwicklungsplanung) University of Stuttgart70174 StuttgartGermany Central Institution for Meteorology and Geodynamics(ZAMG-Zentralanstalt fur Meteorologie und Geodynamik) 1190 ViennaAustria GeoSat ReSeArch Lab IMS-ORTH(Geophysical-SatelliteRemote Sensing and Archaeoenvironment LabInstitute for Mediterranean Studies-Foundation for Research and TechnologyHellas)74100 RethymnoGreece Nova Conservacao S.A.1200-872LisbonPortugal The Archaeological Research Unit Department of Historyand ArchaeologyUniversity of Cyprus1678 NicosiaCyprus Ephorate of Antiquities of Rethymno 74100 RethymnoGreece

Within the framework of disaster risk management, this article proposes an interdisciplinary method for the analysis of multiple natural hazards, including climate change’s influences, in the context of cultural heritage. A taxonomy of natural hazards applicable to cultural heritage was developed based on the existing theoretical and conceptual frameworks. Sudden-onset hazards, such as earthquakes and floods, and slow-onset hazards, such as wetting–drying cycles and biological contamination, were incorporated into the hazard assessment procedure. Future alteration of conditions due to climate change, such as change in heat waves’ duration, was also taken into account. The proposed hazard assessment framework was applied to the case of the Historic Centre of Rethymno, a city on the northern coast of the island of Crete in greece,to identify, analyze, and prioritize the hazards that have the potential to cause damage to the center’s historic structures. The assessment procedure includes climate model projections, GIS spatial modeling and mapping, and finally a hazard analysis matrix to enable the sharing of a better understanding of multiple hazards with the stakeholders.The results can facilitate decision making by providing the vulnerability and risk analysis with the nature and spatial distribution of the significant hazards within the study area and its setting.

关键词： Climate change analysis Crete Cultural heritage protection greece Hazard assessment Historic centre of Rethymno Risk assessment