Measurements of radon content in soil gas and in the thermal waters in Western Turkey

Ereeş, F. S.; Yener, Güngör; Şalk, Müjgan; Özbal, Orhan

doi:10.1016/j.radmeas.2005.06.030

Cited by 42 publications

(19 citation statements)

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“…As can be seen from Table, radon levels recorded in the present study are relatively low when they are compared to corresponding radon activity measured in Italy [5], in Venezuela [8], in Iran [9], in Serbia [10] and also is lower than those reported from other parts of Turkey namely Dikili [12] and Bursa [14], but comparable to radon levels reported from Yalova [11] and from West Anatolia [13]. It is interesting to note that both of Yalova and Sakarya lie on North Anatolian Faulth Zone.…”

Section: Resultssupporting

confidence: 70%

“…However, a very high level of radon in ingested drinking water can also leads to a significant risk of stomach cancer [7]. Because of its potential health hazard, radon level in thermal waters and associated effective doses have been documented in many regions worldwide for decades [5,[8][9][10] and also led to extensive surveys in Turkey [11][12][13][14][15]. In the present study, the radon contents of thermal waters located in Kuzuluk and Taraklı regions of Sakarya were measured and the results were evaluated according to international recommendations.…”

Section: Introductionmentioning

confidence: 99%

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Measurements of Radon Content in the Thermal Waters in Sakarya

et al. 2015

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The paper presents the results of radon concentration measurements in thermal waters of Kuzuluk and Taraklı (Sakarya, Turkey) and their contribution to annual effective dose exposure. The radon measurements were performed using RAD 7, a solid state α detector, with RAD H2O accessory. The results show that the radon activities are within the range of 0.19-5.89 Bql −1 with an average value of 0.98 Bql −1 . The associated annual effective doses have been estimated to range from 0.14 to 0.40 µSvy −1 for ingestion and from 1.81 to 5.14 µSvy −1 for inhalation of radon released from the water. These values are significantly lower than the WHO recommended limit of 100 µSvy −1

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Section: Resultssupporting

confidence: 70%

Section: Introductionmentioning

confidence: 99%

Measurements of Radon Content in the Thermal Waters in Sakarya

et al. 2015

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“…The estimation of radon in the soil-gas and in atmosphere has been suggested as a tool for many investigations such as exploration for uranium, earthquake prediction, groundwater transport and geothermal resource assessments [12,13].…”

Section: Introductionmentioning

confidence: 99%

Radon in soil and its concentration in the atmosphere around Mysore city, India

et al. 2009

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Radon concentration in soil-gas and in the atmospheric air has been studied around Mysore city (12°N and 76°E) using Solid State Nuclear Track Detectors. The radon in soil-gas is found to be higher at a depth of 1 m than at a depth of 0.5 m from the ground surface. The higher radon concentration in soil was observed near Chamundi Hills and Karigatta village with average values of 5.94 kBq.m -3 and 5.32 kBq.m -3 at 1 m depth from the ground surface. Seasonal variations in radon in soil gas shows that, the concentration is lower in summer with an average value of 0.60 kBq.m -3 and higher in monsoon season with an average value of 4.70 kBq.m -3 . Estimation of 226 Ra in soil at these locations is also made using HPGe detector. The activity of 226 Ra, varies from 4.82 to 74.23 Bq.kg -1 with an average value of 32.11 Bq.kg -1 . Radon concentrations in soil-gas shows good correlation with the activity of 226 Ra in soil with a correlation coefficient of 0.76

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“…Although the observed radon levels could be related to several seismic activity that at the fault region occurred with high magnitude, the authors did not infer correlation between seismic activity and radon concentration. Radon concentration in thermal water was investigated by Erees et al (2006Erees et al ( ,2007 at two thermal springs at the Denizli basin site and significant radon anomalies were observed before earthquakes with magnitude between 3.8 and 4.8.…”

Section: Turkeymentioning

confidence: 99%

Radon as Earthquake Precursor

Immé¹,

Morelli²

2012

Earthquake Research and Analysis - Statistical Studies, Observations and Planning

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IntroductionEarthquake predictions are based mainly on the observation of precursory phenomena. However, the physical mechanism of earthquakes and precursors is at present poorly understood, because the factors and conditions governing them are so complicated. Methods of prediction based merely on precursory phenomena are therefore purely empirical and involve many practical difficulties. A seismic precursor is a phenomenon which takes place sufficiently prior to the occurrence of an earthquake. These precursors are of various kind, such as ground deformation, changes in sea-level, in tilt and strain and in earth tidal strain, foreshocks, anomalous seismicity, change in b-value, in microsismicity, in earthquake source mechanism, hypocentral migration, crustal movements, changes in seismic wave velocities, in the geomagnetic field, in telluric currents, in resistivity, in radon content, in groundwater level, in oil flow, and so on. These phenomena provide the basis for prediction of the three main parameters of an earthquake: place and time of occurrence and magnitude of the seismic event.The most important problem with all these precursors is to distinguish signals from noise. A single precursor may not be helpful, the prediction program strategy must involve an integral approach including several precursors. Moreover, in order to evaluate precursory phenomena properly and to be able to use them confidently for predictive purposes, one has to understand the physical processes that give r i s e t o t h e m . P h y s i c a l m o d e l s o f p r e c u r s o ry phenomena are classified in two broad categories: those based on fault constitutive relations, which predict fault slip behavior but no change in properties in material surrounding the fault, and those based on bulk rock constitutive relations, which predict physical property changes in a volume surrounding the fault. Nucleation and lithospheric loading models are the most prominent of the first type and the dilatancy model is of the second type. During the past two decades efforts have been made to measure anomalous emanations of geo-gases in earthquake-prone regions of the world, in particular helium, radon, hydrogen, carbon dioxide. Among them radon has been the most preferred as earthquake precursor, because it is easily detectable. Radon is found in nature in three different isotopes: 222 Rn, member of 238 U series, with an half life of 3.8 days, 220 Rn (also called thoron), member of 232 Th series, with an half life of 54.5 s and 219 Rn, member of 235 U series, with an half life of 3.92 s. Owing to his longer half-life, the most important of them is 222 Rn, produced by 226 Ra decaying. After his production in soil or rocks, 222 Rn can leave the ground crust either by www.intechopen.com Earthquake Research and Analysis -Statistical Studies, Observations and Planning

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Measurements of radon content in soil gas and in the thermal waters in Western Turkey

Cited by 42 publications

References 10 publications

Measurements of Radon Content in the Thermal Waters in Sakarya

Measurements of Radon Content in the Thermal Waters in Sakarya

Radon in soil and its concentration in the atmosphere around Mysore city, India

Radon as Earthquake Precursor

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