2024-03-29T11:12:04Z
https://soar-ir.repo.nii.ac.jp/oai
oai:soar-ir.repo.nii.ac.jp:00011893
2022-12-14T04:14:01Z
1169:1170
Depositional process of organic pollutants deduced from the sediment features in Lake Suwa, central Japan
湖底堆積物からみた諏訪湖における汚染物質の集積過程
公文, 富士夫
池中, 良徳
Lake Suwa
flood sediment
sedimentation rate
persistent organic pollutant
PAH
dioxin
Sedimentation of Lake Suwa is much affected by flood sediments even in the center of the lake. The concentrations of dioxins and PAHs are diluted by such event sediment composed mainly of inorganic,non-contaminated materials. Flood sediment layers dated on 10 June 1950, 29 June 1961 and 28 September 1983 are confirmed in the cored sediments from Lake Suwa. Although the persistent organic pollutants are low in the flood sediments compared with the normal sediments below and above, the total amount of pollutants deposited in one flood is much larger than the annual amount of normal sediments. The annual changes of the persistent organic pollutants amount in the normal sediments well correspond with the history of human activities around the lake. Chemical and other analyses must be based sedimentary unit identified by lithology and density.
Article
第14回環境地質学シンポジウム論文集 : 323-328(2004)
journal article
地質汚染-医療地質-社会地質学会
2004-12
application/pdf
第14回環境地質学シンポジウム論文集
323
328
https://soar-ir.repo.nii.ac.jp/record/11893/files/Geo-E(kumon)01.pdf
jpn