000167850 001__ 167850
000167850 005__ 20260121151419.0
000167850 0247_ $$2doi$$a10.1016/j.radmeas.2010.11.008
000167850 0248_ $$2sideral$$a140458
000167850 037__ $$aART-2011-140458
000167850 041__ $$aeng
000167850 100__ $$0(orcid)0000-0002-4724-7532$$aNavas, A.$$uUniversidad de Zaragoza
000167850 245__ $$aSpatial distribution of natural and artificial radionuclides at the catchment scale (South Central Pyrenees)
000167850 260__ $$c2011
000167850 5203_ $$aNatural and artificial gamma-emitting radionuclides (238U, 226Ra, 232Th, 210Pb, 40K, and 137Cs) were measured in the soils of a small catchment in the Central Pyrenees, Spain. The study was carried out in a mountainous area that was representative of the Tertiary Flysch landscapes in the Southern Pyrenees. Bulk soil cores (n ¼ 77) were collected at the intersections of a 200 200-m grid established in the Arnás River Catchment. Mean radioisotope activities (Bq kg1) were 40 (238U), 27 (226Ra), 35 (232Th), 74 (210Pb), 48 (210Pbex), 590 (40K), and 31 (137Cs). The 210Pb and 137Cs exhibited the greatest variability, whereas 226Ra and 40K showed the least spatial variation. The relationships between basic soil properties and radionuclide activities indicate that only the radionuclides, 210Pbex and 137Cs, that are fixed to the fine fraction of the soil are directly correlated with the organic matter content, whereas the natural radionuclides are inversely correlated with the carbonate content. GIS and geospatial interpolations revealed patterns in the spatial concentrations of radionuclides and indicated important differences in their distributions showing the different behaviour of natural and fallout-derived radionuclides. The radionuclide spatial patterns were strongly correlated with physiographic features such as gradient, orientation, and vegetation cover of the slopes. Within the catchment, the least vegetated and steepest slopes had the lowest radionuclide activities, which suggest that physical processes such as erosion are primary factors in the mobilization of radionuclides in association with soil particles. The results provide insights into the main factors that have affected the spatial distribution of radionuclides in the soils of the catchment, which improves our knowledge of the behaviour of radionuclides in the environment and can lead to a better comprehension of the factors that affect their mobility within ecosystems.
000167850 540__ $$9info:eu-repo/semantics/closedAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000167850 590__ $$a1.177$$b2011
000167850 591__ $$aNUCLEAR SCIENCE & TECHNOLOGY$$b13 / 35 = 0.371$$c2011$$dQ2$$eT2
000167850 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000167850 700__ $$aGaspar, L.
000167850 700__ $$0(orcid)0000-0002-6379-8844$$aLópez-Vicente, M.
000167850 700__ $$aMachín, J.
000167850 7102_ $$12000$$2427$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Geodinámica Externa
000167850 773__ $$g46, 2 (2011), 261-269$$pRadiat. meas.$$tRADIATION MEASUREMENTS$$x1350-4487
000167850 8564_ $$s921424$$uhttps://zaguan.unizar.es/record/167850/files/texto_completo.pdf$$yVersión publicada
000167850 8564_ $$s2696805$$uhttps://zaguan.unizar.es/record/167850/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000167850 909CO $$ooai:zaguan.unizar.es:167850$$particulos$$pdriver
000167850 951__ $$a2026-01-21-14:54:52
000167850 980__ $$aARTICLE