Abstract
This study aimed to explore the potential feasibility of magnetite powder as an erosion tracer for national-scale soil erosion monitoring in China. This study evaluated the effectiveness of silt-sized magnetite powder, a magnetic erosion tracer, in four representative erodible soils in China with distinct textures (from sandy loam to silty clay). The χlf values of different magnetic tracer-tagged aggregate size ranges (> 0.05 mm) were similar based on dry aggregate analysis. Simulated long-term leaching tests showed that the tracer had low mobility in soil profiles. The simultaneous separation of the tracer and tested soils under surface flow scouring conditions indicates that the tracer exhibited good bonding ability with different soils. These findings indicate that magnetite powder is suitable for erosion monitoring in China. This method may be extended to other regions over the world.
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