ドイツにおける森林生態系の環境影響研究　チェルノブイリ原発事故由来の放射性Ｃｓの動態

DOI Web Site Web Site 被引用文献4件 参考文献11件
  • 山本 政儀
    金沢大学理学部附属低レベル放射能実験施設
  • Bunzl Kurt
    Institut für Strahlenschutz, GSF-Forschungzentrum für Umwelt und Gesundheit

書誌事項

タイトル別名
  • Environmental Effect Studies on a Forest Ecosystem in Germany. Transport of Chernobyl-derived radiocesium in a forest.
  • ドイツ ニ オケル シンリン セイタイケイ ノ カンキョウ エイキョウ ケンキ
  • —Transport of Chernobyl-derived radiocesium in a forest—
  • ―チェルノブイリ原発事故由来の放射性Csの動態―

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抄録

Long-term acid deposition on a forest ecosystem can have serious impacts on many physicochemical processes in the soil. Since 1984 extensive studies have been carried out in the “Höglwald”, an old Norway spruce stand near Munich, Germany. In 1986 a variety of radionuclides were deposited in the canopy and on the forest floor of the Höglwald following the reactor accident at Chernobyl. The amount of 137Cs from Chernobyl was about 10 times larger than that present in the soil before Chernobyl. Six experimental plots were established in order to study the potential disturbances caused by artificial acid irrigation and compensative liming. Using these fields, investigations on the interception and retention of radionuclides by a coniferous woodland have been done together with the deposition and vertical migration of the radionuclides in the forest. One of the most important results obtained was that 134Cs deposition velocity in the spruce stand was as high as 5.5mm/s, and thus higher by a factor of 10 than the corresponding value for the grassland. By evaluating the depth profiles of the Chernobyl-derived 137Cs in the soil with a compartment model. The fixation of radiocesium in the forest soil was found to be a rather slow process.

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