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Dr. Georgios Eleftheriou
Institute of Oceanography, Hellenic Centre for Marine Research, 19013 Anavyssos, Greece

Basic Info

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Research Keywords & Expertise

0 Applications of environmental radioactivity in geosciences and oceanography
0 Soil radon monitoring for seismic hazard
0 Submarine groundwater discharges estimation via in-situ gamma-spectrometry
0 Study of sedimentary processes via radiotracers
0 Monte carlo simulations of radionuclides' detectors

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Journal article
Published: 10 August 2020 in Journal of Environmental Radioactivity
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A radiological box model of the Aegean Sea has been developed simulating the dispersion and fate of radionuclides in the marine environment. The model incorporates all transfer processes within abiotic and biotic compartments in combination with appropriate site-specific information. The model was calibrated using empirical radiological data, with the simulation of 137Cs dispersion after the Chernobyl. Environmental sensitivity analysis has been carried out based on Chernobyl 137Cs fallout, in terms of doses to representative marine organisms (fish, crustacean and molluscs) and human population. Comparison of the results with doses from natural sources and sensitivity estimations for shallow marine environments has been performed in order to reveal the vulnerability of each sub-region. The main characteristics and parameters controlling the radioecological processes are also discussed.

ACS Style

Georgios Eleftheriou; Mikhail Iosjpe. Evaluation of the environmental sensitivity of Aegean Sea based on radiological box modeling. Journal of Environmental Radioactivity 2020, 222, 106360 .

AMA Style

Georgios Eleftheriou, Mikhail Iosjpe. Evaluation of the environmental sensitivity of Aegean Sea based on radiological box modeling. Journal of Environmental Radioactivity. 2020; 222 ():106360.

Chicago/Turabian Style

Georgios Eleftheriou; Mikhail Iosjpe. 2020. "Evaluation of the environmental sensitivity of Aegean Sea based on radiological box modeling." Journal of Environmental Radioactivity 222, no. : 106360.

Journal article
Published: 18 February 2020 in Journal of Environmental Radioactivity
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The measurement of radiotracers is recognized as a major tool for the investigation and characterization of submarine groundwater discharges, while the use of underwater gamma-ray spectrometry has been proved a robust solution for the qualitative and quantitative determination of radionuclides in the aquatic environment. The capability of online continuous monitoring of submarine springs by means of gamma-ray spectrometry for direct estimation of SGD velocity and discharge is presented. The quantification of SGD flux rate is based on radon progenies time-series provided by two spectrometers placed above the seabed and near the water surface respectively, coupled with water level and meteorological data. The proposed methodology has been applied for a 5-month period in a coastal karstic system where multiple submarine springs occur at Anavalos-Kiveri, Greece. The estimated flux rates derived from the measured activities revealed significant SGD temporal variations with the mean discharge of 12 m3 s−1 being compatible with previous measurements. The advantages and limitations of direct SGD estimation via underwater gamma-ray monitoring are also discussed.

ACS Style

Georgios Eleftheriou; Filothei Κ. Pappa; Nikos Maragos; Christos Tsabaris. Continuous monitoring of multiple submarine springs by means of gamma-ray spectrometry. Journal of Environmental Radioactivity 2020, 216, 106180 .

AMA Style

Georgios Eleftheriou, Filothei Κ. Pappa, Nikos Maragos, Christos Tsabaris. Continuous monitoring of multiple submarine springs by means of gamma-ray spectrometry. Journal of Environmental Radioactivity. 2020; 216 ():106180.

Chicago/Turabian Style

Georgios Eleftheriou; Filothei Κ. Pappa; Nikos Maragos; Christos Tsabaris. 2020. "Continuous monitoring of multiple submarine springs by means of gamma-ray spectrometry." Journal of Environmental Radioactivity 216, no. : 106180.