Vassiliki Varela

Mrs. Vassiliki Varela

Environmental Research Laboratory (EREL), INRASTES, NCSR “Demokritos”
orcid

Research Focus & Metrics

Academic Career Length

15Years (2012-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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8 August 2019 in Sustainability
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Journal Article
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VVVassiliki Varela
Vassiliki Varela
Diamando VlachogiannisDiamando Vlachogiannis
Diamando Vlachogiannis
Athanasios SfetsosAthanasios Sfetsos
Athanasios Sfetsos
SKStelios Karozis
Stelios Karozis
NPNadia Politi
Nadia Politi
FGFrédérique Giroud
Frédérique Giroud
Fire occurrence and behaviour in Mediterranean-type ecosystems strongly depend on the air temperature and wind conditions, the amount of fuel load and the drought conditions that drastically increase flammability, particularly during the summer period. In order to study the fire danger due to climate change for these ecosystems, the meteorologically based Fire Weather Index (FWI) can be used. The Fire Weather Index (FWI) system, which is part of the Canadian Forest Fire Danger Rating System (CFFDRS), has been validated and recognized worldwide as one of the most trusted and important indicators for meteorological fire danger mapping. A number of FWI system components (Fire Weather Index, Drought Code, Initial Spread Index and Fire Severity Rating) were estimated and analysed in the current study for the Mediterranean area of France. Daily raster-based data-sets for the fire seasons (1st May–31st October) of a historic and a future time period were created for the study area based on representative concentration pathway (RCP) 4.5 and RCP 8.5 scenarios, outputs of CNRM-SMHI and MPI-SMHI climate models. GIS spatial analyses were applied on the series of the derived daily raster maps in order to provide a number of output maps for the study area. The results portray various levels of changes in fire danger, in the near future, according to the examined indices. Number of days with high and very high FWI values were found to be doubled compared to the historical period, in particular in areas of the Provence-Alpes-Côte d’Azur (PACA) region and Corsica. The areas with high Initial Spread Index and Seasonal Spread Index values increased as well, forming compact zones of high fire danger in the southern part of the study area, while the Drought Code index did not show remarkable changes. The current study on the evolution of spatial and temporal distribution of forest fire danger due to climate change can provide important knowledge to the decision support process for prevention and management policies of forest fires both at a national and EU level.

1 January 2012 in Physics and Chemistry of the Earth, Parts A/B/C
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SSStefan J. Scheer
Stefan J. Scheer
VVVassiliki Varela
Vassiliki Varela
GEGeorge Eftychidis
George Eftychidis

1 January 2015 in Tethys: Journal of Mediterranean Meteorology & Climatology
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Journal Article
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VVVassiliki Varela
Vassiliki Varela
Diamando VlachogiannisDiamando Vlachogiannis
Diamando Vlachogiannis

4 May 2021 in Sustainability
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Chrysostomos PsaroudakisChrysostomos Psaroudakis
Chrysostomos Psaroudakis
GXGAVRIIL XANTHOPOULOS
GAVRIIL XANTHOPOULOS
Dimitris StavrakoudisDimitris Stavrakoudis
Dimitris Stavrakoudis
ABAntonios Barnias
Antonios Barnias
VVVassiliki Varela
Vassiliki Varela
Ioannis Z. GitasIoannis Z. Gitas
Ioannis Z. Gitas
Safety in touristic destinations is of utmost importance since tourists’ preferences change frequently in response to emerging threats. Natural hazards are a significant risk and, as such, they need to be considered in the effort for safe tourism. Services and systems monitoring and predicting extreme natural phenomena and disasters in sites of special tourist and cultural interest can lead to more effective risk management and incident response. This paper presents Xenios, a system under development in Greece that provides early warning and risk communication services via web-based and mobile phone applications. We present the user requirements analysis contacted, which led to the design of a modular system architecture through a formal Business Process Model procedure. Currently, early warning systems for wildfire, floods, and extreme weather events are offered, based on a fusion of information from satellite imagery, meteorological forecasts, and risk estimation models. Moreover, visitors’ dispersion monitoring via unmanned aerial vehicles (UAVs) and Wi-Fi connection signals is also offered, along with emergency response planning and ticketing system’s interfacing. The system is built around a modular architecture that permits the easy integration of new subsystems or other danger forecasting modules, depending on the site’s actual needs and limitations. Xenios also provides a mobile app for site visitors, which establishes a communication link for sending alarms, but also serves them with useful tourist information, so that they are encouraged to download and use the app. Finally, the opportunities for supporting a viable business model are also discussed. The results of this study could prove useful in designing other natural risk management systems for sites of cultural and natural interest.

21 January 2021 in Infrastructures
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Athanasios SfetsosAthanasios Sfetsos
Athanasios Sfetsos
FGFrederique Giroud
Frederique Giroud
ACAlice Clemencau
Alice Clemencau
VVVassiliki Varela
Vassiliki Varela
CFCatherine FREISSINET
Catherine FREISSINET
SHStefan Hahmann
Stefan Hahmann
The present work introduces a case study on the climate resilience of interconnected critical infrastructures to forest fires, that was performed within the framework on H2020 EU-CIRCLE project (GA 653824). It was conducted in South France, one of the most touristic European regions, and also one of the regions at the highest forest fire risk that is projected to be amplified under future climate conditions. The case study has been implemented through a co-creation framework with local stakeholders, which is critical in moving beyond physical damages to the infrastructures, introducing the elements of infrastructure business continuity and societal resilience. Future forest fires extremes are anticipated to impact the interconnections of electricity and transportation networks that could further cascade to communities throughout South France. The work highlighted the benefits of enhancing co-operation between academia, emergency responders, and infrastructure operators as a critical element in enhancing resilience through increased awareness of climate impacts, new generated knowledge on fire extremes and better cooperation between involved agencies.

6 January 2022 in Sustainability
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Journal Article
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GXGAVRIIL XANTHOPOULOS
GAVRIIL XANTHOPOULOS
Miltiadis AthanasiouMiltiadis Athanasiou
Miltiadis Athanasiou
ANAlexia Nikiforaki
Alexia Nikiforaki
KKKonstantinos Kaoukis
Konstantinos Kaoukis
GMGEORGE MANTAKAS
GEORGE MANTAKAS
VVVassiliki Varela
Vassiliki Varela
The island of Kythira in Greece suffered a major forest fire in 2017 that burned 8.91% of its total area and revealed many challenges regarding fire management. Following that, the Hellenic Society for the Protection of Nature joined forces with the Institute of Mediterranean and Forest Ecosystems in a project aiming to improve fire prevention there through mobilization and cooperation of the population. This paper describes the methodology and the results. The latter include an in-depth analysis of fire statistics for the island, development of a forest fuels map, and prevention planning for selected settlements based on fire modeling and on an assessment of the vulnerability of 610 structures, carried out with the contribution of groups of volunteers. Emphasis was placed on informing locals, including students, through talks and workshops, on how to prevent forest fires and prepare their homes and themselves for such an event, and on mobilizing them to carry out fuel management and forest rehabilitation work. In the final section of the paper, the challenges that the two partners faced and the project achievements and shortcomings are presented and discussed, leading to conclusions that can be useful for similar efforts in other places in Greece and elsewhere.