Author(s): Kaori Noda; Masaya Aoki; Hiromoto Inoue; Seiya Kudo; Tomonori Osugi; Jiro Okitsu; Hirofumi Tazoe; Masatishi Yamada; Nobuyuki Azuma
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Keywords: No Keywords
Abstract: Concentration of trace elements and radio isotopes in fish, POM (particulate organic matter), water and sediment from the Miharu-dam lake were analyzed. Miharu-dam lake is located near Kori-yama where is about 50km east from Fukushima Daiichi nuclear power station. The lake water is supplied from basin of four rivers and frontal dam is equipped at the inlet of each river to reduse inflow of soil. The objective of this study is to elucidate influences of frontal dam on dynamics of elements in water ecosystem surrounding forest at this area. Time trend of radioactive element concentrations before and after the power plant s’ disaster is also considered. Samples were caught for the duration between from 2010 to 2017. Elements in POM and sediment were analized separately on chemical form with sequential extraction (BCR method). Twenty eight trace element concentrations were analyzed by ICP-AES (SHIMAZU ICP-9820). Radio isotopes were measured with γ spectrometer. At front dam lake a large number of element concentrations in sediment were significantly higher than those from main dam lake. It is obvious that front dam work as obstacle on movement of many elements.
Year: 2018