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Título

Evaluation of magnetic iron oxides as sediment tracers in water erosion experiments

Autor Guzmán, Gema ; Barrón, Vidal; Gómez Calero, José Alfonso
Palabras clave Erosion
Tracers
Magnetic
Iron oxides
Fecha de publicación 15-ago-2010
EditorElsevier
Citación Catena 82(2): 126-133 (2010)
ResumenWater erosion is one of the major concerns with regard to sustainability of agricultural systems in Mediterranean countries (e.g. olive farming areas in Southern Spain). The limitations of the technologies traditionally used in erosion measurement has created increased interest in the use of innovative erosion tracers useful for monitoring erosion and determining deposition rates in the field. In this work, we evaluated the potential of magnetic iron oxide (Fe3O4) as a soil tracer. Particle size distribution of the magnetic iron oxide, mobility under drainage conditions and the effect of the aggregate size distribution in blank and tagged soils were studied. The use of magnetic iron oxide to estimate soil losses at small-scale was also examined using a portable rainfall simulator and measuring magnetic susceptibility before and after each simulated rainfall. The properties of the magnetic iron oxide, including a particle size distribution similar to that of soil aggregates, strong binding to soil particles, little mobility in soil, very high magnetic susceptibility relative to the typically low background values of the studied soils, innocuous to environment and low cost, make it an effective soil tracer for estimating soil losses at a small-scale. © 2010 Elsevier B.V.
URI http://hdl.handle.net/10261/87812
DOI10.1016/j.catena.2010.05.011
Identificadoresdoi: 10.1016/j.catena.2010.05.011
issn: 0341-8162
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