Temporal changes in dissolved ¹³⁷Cs concentrations in groundwater and stream water in Fukushima after the Fukushima Dai-ichi Nuclear Power Plant accident

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• 作者：Sho Iwagami^a ; ^{sho.iwagami@gmail.com} ; Maki Tsujimura^b ; Yuichi Onda^a ; Masataka Nishino^c ; Ryohei Konuma^d ; Yutaka Abe^b ; Manami Hada^b ; Ishwar Pun^b ; Aya Sakaguchi^e ; Hiroaki Kondo^e ; Masayoshi Yamamoto^f ; Yoshiki Miyata^f ; Yasuhito Igarashi^g
• 关键词：Dissolved 137Cs ; Fukushima Dai-ichi Nuclear Power Plant ; Stream water ; Groundwater ; Rainstorm event
• 刊名：Journal of Environmental Radioactivity
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：166
• 期：part_P3
• 页码：458-465
• 全文大小：1353 K
• 卷排序：166

文摘

The highest stream water dissolved 137Cs concentration recorded at Iboishi-yama was 1.2 Bq/L on August 6, 2011. During the rainfall events, the concentration of dissolved 137Cs concentration in stream water increased temporarily. The dissolved 137Cs concentration in groundwater at a depth of 30 m at Iboishi-yama ranged 0.0025–0.039 Bq/L. The effective half-lives of stream water in the initial fast flush and secondary phases were 0.10–0.21 and 0.69–1.5 y. The effective half-lives of groundwater was 0.46–0.58 y at Koutaishi-yama and 0.50–3.3 y at Iboishi-yama.