title: Inventory and vertical migration of ¹³⁷Cs in Spanish mainland soils.
abstract: In this study the total activity of (137)Cs deposited per unit area over the Spanish peninsular territory was analysed using a 150 × 150 km(2) mesh grid, with samples taken from 29 points. The deposited activities ranged between 251 and 6074 Bq/m(2). A linear relationship was obtained between these values and the mean annual rainfall at each sampling point which allowed a map to be drawn, using GIS software, which shows the distribution of total deposited (137)Cs activity across the Spanish mainland. At twelve of these sampling points the vertical migration profile of (137)Cs was obtained. These profiles are separated into two groups with different behaviour, one of which includes clay and loam soils and the other containing sandy soils. For both groups of profiles the parameters of the convective-diffusive model, which describes the vertical migration of (137)Cs in the soil, v (apparent convection velocity) and D (apparent diffusion coefficient) were calculated.
authors.affiliation: Dept. Nuclear Engineering and Fluid Mechanics, University of Basque Country, Alda Urquijo, s/n, E-48013 Bilbao, Spain.
authors.forename: F
authors.initials: F
authors.lastname: Legarda
authors.forename: L M
authors.initials: LM
authors.lastname: Romero
authors.forename: M
authors.initials: M
authors.lastname: Herranz
authors.forename: M
authors.initials: M
authors.lastname: Barrera
authors.forename: R
authors.initials: R
authors.lastname: Idoeta
authors.forename: F
authors.initials: F
authors.lastname: Valiño
authors.forename: C
authors.initials: C
authors.lastname: Olondo
authors.forename: A
authors.initials: A
authors.lastname: Caro
mesh_terms: D000538:Aluminum Silicates / Q000032:analysis / Q000737:chemistry; D001417:Background Radiation; D002588:Cesium Radioisotopes / Q000032:analysis*; D000077215:Clay; D002980:Climate; D004058:Diffusion; D004784:Environmental Monitoring; D008962:Models, Theoretical; D011847:Radioactive Fallout / Q000032:analysis*; D012987:Soil / Q000737:chemistry*; D012990:Soil Pollutants, Radioactive / Q000032:analysis*; D013030:Spain
chemical_list: D000538:Aluminum Silicates; D002588:Cesium Radioisotopes; D011847:Radioactive Fallout; D012987:Soil; D012990:Soil Pollutants, Radioactive; D000077215:Clay