Diffusion and Transportation Dynamics of 137Cs Deposited on the Forested Area in Fukushima After the Fukushima Daiichi Nuclear Power Plant Accident in March 2011

Ohte, Nobuhito; Murakami, Masashi; Suzuki, Takahiro; Iseda, Kohei; Tanoi, Keitaro; Ishii, Nobuyoshi

doi:10.1007/978-4-431-54328-2_16

Cited by 11 publications

(5 citation statements)

References 11 publications

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“…Our four-year monitoring study since early 2012 at a forested headwater catchment in the northern part of Fukushima have demonstrated that radiocesium movement has been most drastic during the early years after the accident (Ohte et al 2013(Ohte et al , 2016. Observed results have shown that radiocesium has continuously moved from the forest canopies to the forest floor with throughfall, stemflow and litter fall (Endo et al 2015).…”

Section: Introductionmentioning

confidence: 81%

Agricultural Implications of the Fukushima Nuclear Accident (III)

Nakanishi¹,

O’Brien²,

Tanoi³

2019

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Section: Introductionmentioning

confidence: 81%

Agricultural Implications of the Fukushima Nuclear Accident (III)

Nakanishi¹,

O’Brien²,

Tanoi³

2019

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“…Moreover, standing trees in the main forest were cut down and sampled in November of both 2012 and 2013 to estimate the amount of radioactive cesium buildup above the ground. The samples were divided into live leaves, branches, and trunks (bark, sapwood, and heartwood) to measure the radioactive cesium concentration 10,11) .…”

Section: Survey Methodsmentioning

confidence: 99%

“…This paper reports the survey results using data obtained by the end of FY2014 to consider necessary surveys and measures for the future. It may be noted that most of the findings have already been published in the references [10][11][12] .…”

Section: Introductionmentioning

confidence: 99%

Movements and Storages of Radiocesium in a Forest Ecosystem in Fukushima

Ohte

2021

Insights Concerning the Fukushima Daiichi Nuclear Accident Vol. 2&3

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The disaster that occurred at the Fukushima Daiichi Nuclear Power Plant in March 2011 resulted in a massive dispersion of radioactive cesium ( 137 Cs) over vast forests and other surrounding areas. The author has conducted intensive monitoring in a water catchment area located in northern Fukushima to determine and explain how exactly 137 Cs migrates to and builds up in a forest ecosystem before being discharged from it. This monitoring revealed that the amount of 137 Cs that is discharged from the forest over the course of one year was at least two orders of magnitude less than the estimated amount of deposition immediately after the disaster. It has been suggested that the migration takes place mainly in the form of suspended solids with particulate organics serving as important carriers. The largest 137 Cs pools in the forest ecosystem proved to be the litter layer and the topsoil. The circulation of 137 Cs was also indicated within flora, including tall trees. The dispersion of 137 Cs within the biological communities of animals and other creatures was more notable in terms of migration through food webs extending from animals that feed on fallen leaves and their fragments as compared to migration through food webs extending from animals that feed on live leaves. No increase in the 137 Cs concentration was observed with the rise in the trophic level, which demonstrates that no biological accumulation took place.

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“…Therefore, it is necessary to investigate the major pathways of radiocesium transfer in the forest, such as physical transportation via hydrological processes and biological transfer through the food web in terrestrial and aquatic ecosystems. To describe the current status and to examine the hypothesized mechanisms mentioned above, catchment scale biogeochemical observations have been conducted in the northern part of the Fukushima prefecture since August 2012 (Ohte et al 2012(Ohte et al , 2013, and they currently continue (February 2015). Here, we report the latest results and discuss the future perspectives for monitoring radiocesium levels in Fukushima forests.…”

Section: Introductionmentioning

confidence: 99%

Ecosystem Monitoring of Radiocesium Redistribution Dynamics in a Forested Catchment in Fukushima After the Nuclear Power Plant Accident in March 2011

Ohte

Murakami

Endo

et al. 2016

Agricultural Implications of the Fukushima Nuclear Accident

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The accident at the Fukushima Daiichi Nuclear Power Plant in March 2011 emitted 1.2 Â 10 16 Bq of cesium-137 ( 137 Cs) into the surrounding environment. Radioactive substances, including 137 Cs, were deposited onto forested areas in the northeastern region of Japan. 137 Cs is easily adsorbed onto clay minerals in the soil; thus, a major portion of 137 Cs can be transported as eroding soil and particulate organic matter in water discharge. Dissolved 137 Cs can be taken up by microbes, algae, and plants in soil and aquatic systems. Eventually, 137 Cs is introduced into insects, worms, fishes, and birds through the food web. To clarify the mechanisms of dispersion and export of 137 Cs, within and from a forested ecosystem, we conducted intensive monitoring on the 137 Cs movement and storage in a forested headwater catchment in an area approximately 50 km from the Nuclear Power Plant. Two major pathways of 137 Cs transport are as follows: (1) by moving water via dissolved and particulate or colloidal forms and (2) by dispersion through the food web in the forest-stream ecological continuum. The 137 Cs concentrations of stream waters were monitored. Various aquatic and terrestrial organisms were

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Diffusion and Transportation Dynamics of 137Cs Deposited on the Forested Area in Fukushima After the Fukushima Daiichi Nuclear Power Plant Accident in March 2011

Cited by 11 publications

References 11 publications

Agricultural Implications of the Fukushima Nuclear Accident (III)

Agricultural Implications of the Fukushima Nuclear Accident (III)

Movements and Storages of Radiocesium in a Forest Ecosystem in Fukushima

Ecosystem Monitoring of Radiocesium Redistribution Dynamics in a Forested Catchment in Fukushima After the Nuclear Power Plant Accident in March 2011

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