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  1. 紀要論文
  2. 琉球大学理工学部紀要 理学編
  3. 23号
  1. 部局別インデックス
  2. 理学部

南大東島および北大東島の池沼ならびに地下水の水質

http://hdl.handle.net/20.500.12000/24475
http://hdl.handle.net/20.500.12000/24475
1648a839-b5e7-485c-ae77-b06509e0a3fa
名前 / ファイル ライセンス アクション
No23p013.pdf No23p013.pdf
Item type デフォルトアイテムタイプ(フル)(1)
公開日 2012-05-24
タイトル
タイトル 南大東島および北大東島の池沼ならびに地下水の水質
言語 ja
作成者 兼島, 清

× 兼島, 清

ja 兼島, 清

平良, 初男

× 平良, 初男

ja 平良, 初男

渡久山, 章

× 渡久山, 章

ja 渡久山, 章

大森, 保

× 大森, 保

ja 大森, 保

西浜, 完治

× 西浜, 完治

ja 西浜, 完治

Kaneshima, Kiyoshi

× Kaneshima, Kiyoshi

en Kaneshima, Kiyoshi

Taira, Hatsuo

× Taira, Hatsuo

en Taira, Hatsuo

Tokuyama, Akira

× Tokuyama, Akira

en Tokuyama, Akira

Oomori, Tamotsu

× Oomori, Tamotsu

en Oomori, Tamotsu

Nishihama, Kanji

× Nishihama, Kanji

en Nishihama, Kanji

アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
内容記述
内容記述タイプ Other
内容記述 The waters on both Minami and Kita Daito Jima have been collected, to discuss the geochemical natures on the islands, during last March 10th to 17th on 1976. The chemical analysis resulted in the following: Most of the lake waters on Minami Daito Jima fall in the average chlorinity of 0.26‰ , whereas the other waters collected from caves and wells present higher average chlorinity of 1.16‰. The chlorinities on Kita Daito Jima are also relatively high of 0.77‰ on the average. The study of correlation coefficients among chemical components, particularly the straightfoward positive correlation between sodium and chlorinity as in the same for sea water, strongly suggests the major influence of sea water on these islands. The other components such as K^+ and SO_4^=, also display nearly the same trend with those in sea water, but few samples give the evidence of contaminations which would be resulted from the human activities. The higher magnesium contents, however, may be concluded from the other cource of inputs besides the influences of sea water and human activities. The excess contents of magnesium in the ratio of Mg/Cl with respect to that in sea water may be resulted from the dissolution of dolomite which is one of the major carbonates in Daito Islands. Geochemical considerations of these excess magnesium and calcium are discussed in detail in this paper. The influence of the human activities on waters have also been studied for chemical components such as NH_<3^->N, O_2 and PO_<4^->,-P. And the vertical variations of the concentrations with depth and source of input in lakes on the islands have been verified. With the considerations of the data mentioned above, the present paper also estimated the main roots of incomming sea water from the open ocean toward to many lakes and marshes in Daito Islands.
内容記述タイプ Other
内容記述 紀要論文
出版者
言語 ja
出版者 琉球大学理工学部
言語
言語 jpn
資源タイプ
資源タイプ departmental bulletin paper
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
識別子
識別子 http://hdl.handle.net/20.500.12000/24475
識別子タイプ HDL
収録物識別子
収録物識別子タイプ NCID
収録物識別子 AN0025080X
収録物名
言語 ja
収録物名 琉球大学理工学部紀要. 理学編
書誌情報
号 23, p. 13-41
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