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海底堆積物を用いた有明海100年変遷史の環境評価
http://hdl.handle.net/2298/18693
http://hdl.handle.net/2298/1869386e42428-6afe-4bca-904a-b65348ed974f
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
114_1.pdf (3.0 MB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2011-04-28 | |||||
| タイトル | ||||||
| タイトル | 海底堆積物を用いた有明海100年変遷史の環境評価 | |||||
| 言語 | ||||||
| 言語 | jpn | |||||
| キーワード | ||||||
| 主題 | 有明海, 環境評価, 微量元素, 210Pb年代, 海底堆積物, Ariake Bay, environmental assessment, trace elements, 210Pb dating, submarine sediments | |||||
| 資源タイプ | ||||||
| 資源タイプ | journal article | |||||
| 著者 |
横瀬, 久芳
× 横瀬, 久芳× 百島, 則幸× 松岡, 數充× 長谷, 義隆× 本座, 栄一 |
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| 別言語の著者 |
Yokose, Hisayoshi
× Yokose, Hisayoshi× Momoshima, Noriyuki× Matsuoka, Kazumi× Hase, Yoshitaka× Honza, Eiichi |
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| 内容記述 | ||||||
| 内容記述 | Submarine sediments in Ariake Bay, Kyushu Japan, were examined to assess geoenvironmental changes in the area. 6 core samples from representative stations (Stas. 1-6) were analyzed for 16 minor elements (S, Cl, Ba, Rb, Th, Nb, Zr, Y, Ga, V, Zn, Cu, Ni, Co, Cr, and Pb) using XRF. Based on measurements of 210Pb radioactivity, sedimentation rates at 2 stations, one off the Chikugo River (Sta. 2) and the other at the mouth of Isahaya Bay (Sta. 4), were calculated, respectively, at 0.24 cm/year and a maximum of 0.15 cm/year. The concentrations of heavy metals, such as Cr, Ni, Zn, and Pb, in the marine sediments are about one-third of those of the highly polluted marine sediments recorded in Tokyo Bay around 1970. The vertical profile of a minor element can be divided into an upper section and a lower section. The upper section indicates various gradual changes, but the lower section is almost constant. The boundaries between the sections roughly correspond to the beginning of the 20th century, based on the sedimentation rate. Zn and Pb in the submarine sediments can be useful indicators to trace suspended mud derived from the Chikugo River. The complementary relationship of the vertical profiles in the spatial distribution suggests that the continuous migration of the sedimentary province may be governed by the geometrical arrangement of the estuaries of major rivers and by the tidal circulation pattern in Ariake Bay. Probably, large dams built on the major rivers have hampered the sedimentation process dominated by traction flow and have decreased the maximum drainage speed. As a result, such processes have promoted the expansion of the muddy area in Ariake Bay. |
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| 内容記述 | ||||||
| 内容記述 | Planktonic dinoflagellata (Sta. 2) and diatom (Sta. 4) fossils were also analyzed. Assuming such sedimentation rates at the stations, marine phytoplanktons (Brigantedinium spp., Rhizosorenia spp. and Skeletonema costatum), which indicate eutrophication of the sea water, have increased in relative abundance during the past 10 years. | |||||
| 書誌情報 |
地學雜誌 巻 114, 号 1, p. 1-20, 発行年 2005-02-25 |
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| 書誌レコードID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AN00322536 | |||||
| 権利 | ||||||
| 権利情報 | © Tokyo Geographical Society | |||||
| 情報源(ISSN) | ||||||
| 関連名称 | 0022135X | |||||
| フォーマット | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | application/pdf | |||||
| 形態 | ||||||
| 3043290 bytes | ||||||
| 著者版フラグ | ||||||
| 出版タイプ | VoR | |||||
| 日本十進分類法 | ||||||
| 主題Scheme | NDC | |||||
| 主題 | 452 | |||||
| その他の言語のタイトル | ||||||
| その他のタイトル | Environmental Assessments of Ariake Bay during the Past 100 Years Based on Marine Sediments | |||||
| タイトル（ヨミ） | ||||||
| その他のタイトル | カイテイ タイセキブツ オ モチイタ アリアケカイ 100ネン ヘンセンシ ノ カンキョウ ヒョウカ | |||||
| 出版者 | ||||||
| 出版者 | 社団法人 東京地学協会 | |||||
| 資源タイプ | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 論文(Article) | |||||
| 資源タイプ・ローカル | ||||||
| 雑誌掲載論文 | ||||||
| 資源タイプ・NII | ||||||
| Journal Article | ||||||
| 資源タイプ・DCMI | ||||||
| text | ||||||
| 資源タイプ・ローカル表示コード | ||||||
| 01 | ||||||
| URL | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | http://www.journalarchive.jst.go.jp/japanese/jnlabstract_ja.php?cdjournal=jgeography1889&cdvol=114&noissue=1&startpage=1 | |||||
