Fig.1-31 The amount of sediment erosion and deposition (a) and the fraction of residual 137Cs (b) from May 2011 to December 2015
These maps show spatial redistribution of the sediment and radiocesium discharge through rivers from forested areas including crop and paddy fields. The area in the vicinity of river channel and forest gullies experience a large amount of sediment erosion, thus resulting in a reduction of residual 137Cs.
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