For the long slope (Fig. 1a), 137Cs inventories were found to increase from the upper to lower slope positions, being the lowest at the top and the highest at the foot position (100–110 m), with the latter being 2 times higher than that of the former.
Along the short slope transect, 137Cs inventories also increased from the top to foot slope positions (Fig. 1c), with a 57.1% increase at the foot slope position compared to that at the top of the slope.
These suggest that soil loss occurred at the upper slope positions and soil accumulation at the foot slope positions.