Assessment of the caesium-137 flux adsorbed to suspended sediment in a reservoir in the contaminated Fukushima region in Japan

Mouri, Goro; Golosov, Valentin; Shiiba, Michiharu; Hori, Toshitaka

doi:10.1016/j.envpol.2013.12.018

Cited by 30 publications

(32 citation statements)

References 60 publications

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“…Overall, the literature clearly demonstrates that the majority of soil erosion and concomitant radiocesium migration, coincides with extreme rainfall-runoff events (Minoura et al, 2014;Mouri et al, 2014;Nagao et al, 2013;Onishi et al, 2014). In fact, most sediment and radiocesium migration is thought to occur during short flood events that may occur 1e2 times per year .…”

Section: Radiocesium Mobilization: Rainfall Regimementioning

confidence: 96%

“…Mouri et al (2014), Yamada et al (2015) and Kurikami et al (2013) demonstrated that reservoir management could assist in the control of radiocesium fluxes. The challenge with the management of these reservoirs in the temperate/monsoonal climate in the Fukushima region is that occasional water releases are required for their safe operation.…”

Section: Radiocesium Storage: Reservoirs and Damsmentioning

confidence: 97%

“…Mouri et al (2014) examined radiocesium inputs to the Kusaki Dam reservoir on the edge of the fallout affected region. The authors incorporated mixed-particle size distributions into a sediment transport equation to determine sedimentation and concomitant 137 Cs deposition in the reservoir.…”

Section: Modelling Radiocesium Catchment Scale Transfersmentioning

confidence: 99%

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Radiocesium transfer from hillslopes to the Pacific Ocean after the Fukushima Nuclear Power Plant accident: A review

Evrard

Laceby

Lepage

et al. 2015

Journal of Environmental Radioactivity

159

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The devastating tsunami triggered by the Great East Japan Earthquake on March 11, 2011 inundated the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) resulting in a loss of cooling and a series of explosions releasing the largest quantity of radioactive material into the atmosphere since the Chernobyl nuclear accident. Although 80% of the radionuclides from this accidental release were transported over the Pacific Ocean, 20% were deposited over Japanese coastal catchments that are subject to frequent typhoons. Among the radioisotopes released during the FDNPP accident, radiocesium ((134)Cs and (137)Cs) is considered the most serious current and future health risk for the local population. The goal of this review is to synthesize research relevant to the transfer of FDNPP derived radiocesium from hillslopes to the Pacific Ocean. After radiocesium fallout deposition on vegetation and soils, the contamination may remain stored in forest canopies, in vegetative litter on the ground, or in the soil. Once radiocesium contacts soil, it is quickly and almost irreversibly bound to fine soil particles. The kinetic energy of raindrops instigates the displacement of soil particles, and their bound radiocesium, which may be mobilized and transported with overland flow. Soil erosion is one of the main processes transferring particle-bound radiocesium from hillslopes through rivers and streams, and ultimately to the Pacific Ocean. Accordingly this review will summarize results regarding the fundamental processes and dynamics that govern radiocesium transfer from hillslopes to the Pacific Ocean published in the literature within the first four years after the FDNPP accident. The majority of radiocesium is reported to be transported in the particulate fraction, attached to fine particles. The contribution of the dissolved fraction to radiocesium migration is only relevant in base flows and is hypothesized to decline over time. Owing to the hydro-meteorological context of the Fukushima region, the most significant transfer of particulate-bound radiocesium occurs during major rainfall and runoff events (e.g. typhoons and spring snowmelt). There may be radiocesium storage within catchments in forests, floodplains and even within hillslopes that may be remobilized and contaminate downstream areas, even areas that did not receive fallout or may have been decontaminated. Overall this review demonstrates that characterizing the different mechanisms and factors driving radiocesium transfer is important. In particular, the review determined that quantifying the remaining catchment radiocesium inventory allows for a relative comparison of radiocesium transfer research from hillslope to catchment scales. Further, owing to the variety of mechanisms and factors, a transdisciplinary approach is required involving geomorphologists, hydrologists, soil and forestry scientists, and mathematical modellers to comprehensively quantify radiocesium transfers and dynamics. Characterizing radiocesium transfers from hillslopes to the Pacific Ocean is necess...

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Section: Radiocesium Mobilization: Rainfall Regimementioning

confidence: 96%

Section: Radiocesium Storage: Reservoirs and Damsmentioning

confidence: 97%

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Radiocesium transfer from hillslopes to the Pacific Ocean after the Fukushima Nuclear Power Plant accident: A review

Evrard

Laceby

Lepage

et al. 2015

Journal of Environmental Radioactivity

159

View full text Add to dashboard Cite

show abstract

“…For example, large amount of radionuclides have been released into water, soil, and air after the Fukushima Daiichi Nuclear Power Plant Disaster. As a result, the treatment of radioactive wastewater has drawn growing attentions all over the world [2,3]. Among the radionuclides found in water, 137 Cs and 90 Sr are the most hazardous and abundant contaminants due to their long half-lives and high radioactivity.…”

Section: Introductionmentioning

confidence: 99%

Effects of feed solution chemistry on low pressure reverse osmosis filtration of cesium and strontium

Ding

Huang

et al. 2015

Journal of Hazardous Materials

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“…In fact, the majority of soil erosion and concomitant radiocesium migration was reported to coincide with extreme rainfall events (Mouri et al, 2014;Nagao et al, 2013;Onishi et al, 2014). For example, reported that most sediment-bound radiocesium migration occurs in flood events that may only occur 1 to 2 times per year.…”

Section: Introductionmentioning

confidence: 99%

Rainfall erosivity in catchments contaminated with fallout from the Fukushima Daiichi nuclear power plant accident

Laceby

Chartin

Evrard

et al. 2016

Hydrol. Earth Syst. Sci.

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Abstract. The Fukushima Daiichi nuclear power plant (FD-NPP) accident in March 2011 resulted in the fallout of significant quantities of radiocesium over the Fukushima region. After reaching the soil surface, radiocesium is quickly bound to fine soil particles. Thereafter, rainfall and snowmelt run-off events transfer particle-bound radiocesium downstream. Characterizing the precipitation regime of the fallout-impacted region is thus important for understanding post-deposition radiocesium dynamics. Accordingly, 10 min (1995Accordingly, 10 min ( -2015 and daily precipitation data from 42 meteorological stations within a 100 km radius of the FDNPP were analyzed. Monthly rainfall erosivity maps were developed to depict the spatial heterogeneity of rainfall erosivity for catchments entirely contained within this radius. The mean average precipitation in the region surrounding the FDNPP is 1420 mm yr −1 (SD 235) with a mean rainfall erosivity of 3696 MJ mm ha −1 h −1 yr −1 (SD 1327). Tropical cyclones contribute 22 % of the precipitation (422 mm yr −1 ) and 40 % of the rainfall erosivity (1462 MJ mm ha −1 h −1 yr −1 (SD 637)). The majority of precipitation (60 %) and rainfall erosivity (82 %) occurs between June and October. At a regional scale, rainfall erosivity increases from the north to the south during July and August, the most erosive months. For the remainder of the year, this gradient occurs mostly from northwest to southeast. Relief features strongly influence the spatial distribution of rainfall erosivity at a smaller scale, with the coastal plains and coastal mountain range having greater rainfall erosivity than the inland Abukuma River valley. Understanding these patterns, particularly their spatial and temporal (both inter-and intraannual) variation, is important for contextualizing soil and particle-bound radiocesium transfers in the Fukushima region. Moreover, understanding the impact of tropical cyclones will be important for managing sediment and sediment-bound contaminant transfers in regions impacted by these events.

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Assessment of the caesium-137 flux adsorbed to suspended sediment in a reservoir in the contaminated Fukushima region in Japan

Cited by 30 publications

References 60 publications

Radiocesium transfer from hillslopes to the Pacific Ocean after the Fukushima Nuclear Power Plant accident: A review

Radiocesium transfer from hillslopes to the Pacific Ocean after the Fukushima Nuclear Power Plant accident: A review

Effects of feed solution chemistry on low pressure reverse osmosis filtration of cesium and strontium

Rainfall erosivity in catchments contaminated with fallout from the Fukushima Daiichi nuclear power plant accident

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