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Use of Beryllium-7 to Document Soil Redistribution following Forest Harvest Operations

^a Facultad de Ciencias, Universidad Austral de Chile, Casilla 567, Valdivia, Chile
^b Facultad de Ciencias Forestales, Universidad Austral de Chile, Casilla 567, Valdivia, Chile
^c Department of Geography, University of Exeter, Amory Building, Rennes Drive, Exeter EX4 4RJ, UK

View larger version (19K): [in a new window]   Fig.1. Daily precipitation totals for the study period and the preceding month (A) and hourly precipitation totals for the period with maximum rainfall intensities (B).

View larger version (7K): [in a new window]   Fig. 2. The linear regression between the natural logarithm of the 7Be areal activity density and mass depth derived for the reference site.

View larger version (18K): [in a new window]   Fig. 3. The vertical distribution of 7Be at the reference site. (A) A plot of the mass activity density versus mass depth. (B) The reduction of the areal activity density with increasing mass depth.

View larger version (18K): [in a new window]   Fig. 4. The spatial distribution of the soil erosion (negative values) and sedimentation (positive values), kg m–2, along the slope transects of the study site. The decimal point of each number coincides with the position of the corresponding sampling point. The dashed lines represent contour lines. (A) Soil redistribution values determined using the 7Be approach, and (B) those obtained from the erosion pins.