title: Dose rate estimates and spatial interpolation maps of outdoor gamma dose rate with geostatistical methods; A case study from Artvin, Turkey.
abstract: In this study, compliance of geostatistical estimation methods is compared to ensure investigation and imaging natural Fon radiation using the minimum number of data. Artvin province, which has a quite hilly terrain and wide variety of soil and located in the north-east of Turkey, is selected as the study area. Outdoor gamma dose rate (OGDR), which is an important determinant of environmental radioactivity level, is measured in 204 stations. Spatial structure of OGDR is determined by anisotropic, isotropic and residual variograms. Ordinary kriging (OK) and universal kriging (UK) interpolation estimations were calculated with the help of model parameters obtained from these variograms. In OK, although calculations are made based on positions of points where samples are taken, in the UK technique, general soil groups and altitude values directly affecting OGDR are included in the calculations. When two methods are evaluated based on their performances, it has been determined that UK model (r = 0.88, p < 0.001) gives quite better results than OK model (r = 0.64, p < 0.001). In addition, as a result of the maps created at the end of the study, it was illustrated that local changes are better reflected by UK method compared to OK method and its error variance is found to be lower.
authors: Artvin Çoruh University, Faculty of Art and Science, Department of Physics, 08100 Artvin, Turkey. Electronic address: cmertyesilkanat@gmail.com.
authors: Cafer Mert
authors: CM
authors: Yeşilkanat
authors: Artvin Çoruh University, Faculty of Engineering, Energy Systems Engineering, 08100 Artvin, Turkey.
authors: Yaşar
authors: Y
authors: Kobya
authors: TAEK, Cekmece Nuclear Research and Training Centre, Altınşehir Yolu 5 Km, Halkali, 34303 Istanbul, Turkey.
authors: Halim
authors: H
authors: Taşkin
authors: Karadeniz Technical University, Faculty of Science, Department of Physics, 61000 Trabzon, Turkey.
authors: Uğur
authors: U
authors: Çevik
mesh_terms: D000396:Air Pollutants, Radioactive / Q000032:analysis*; D005720:Gamma Rays; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000191:economics / Q000379:methods*; D062206:Spatial Analysis; D014421:Turkey
chemical_list: D000396:Air Pollutants, Radioactive
keywords: Artvin; Dose estimation; Geostatistic; Interpolated map; Outdoor gamma dose rate