Radiocesium mobility in the environment after the Fukushima Dai-ichi Nuclear Power Plant accident; Variation of Cs concentration in sediments in a brackish lake, Matsukawa-ura lagoon

Misono, Toshiharu   ; Sakuma, Kazuyuki   ; Nakanishi, Takahiro   ; Yoshimura, Kazuya  ; Funaki, Hironori ; Shiribiki, Takehiko*; Watanabe, Yusuke  ; Hayashi, Seiji*; Tsuji, Hideki*; Tsumune, Daisuke*; Miura, Hikaru*

In brackish lakes, suspended solids containing Cs in rivers tend to flocculate and precipitate around the estuary. Therefore, trends in the variability of Cs in sediments in brackish lakes are expected to differ in each incoming river but have not yet been quantified. It is important to assess the relationship between river basin and estuarine sediments to predict future changes in Cs within brackish lakes. In this study, the trend of variability of Cs in sediments within brackish lakes was assessed in detail, including land use patterns in river basins.