タイトルヨミ
シマネケン コリョウチョウ ジャイケ ノ カンキョウ チシツ
タイトル別表記
Environmental geology of Lake Jaike,Koryo-cho,Shimane Prefecture,Japan
ファイル
言語
日本語
著者
三原 章人
内容記述(抄録等)
Geochemical amlyses of bottom sediments and cored samples have been carried out to evaluate environmental changes of the non-marine Lake Jaike of San'in district.Soils of surrounding areas and sediments of the Lake Jinzai of brachish environment are also examined for comparative study.Cored samples with 70cm length showed gradually increasing concentrations of arsenic(from 12 to 31 ppm),lead(from 24 to 31 ppm),zinc(from 95 to 144 Pppm),phosphorous(P_2O_5,from O.09 to O.28 wt%)and total iron(from 8.20 to 11.15 wt%)but with relatively consistent values in chromium(75-83 ppm)and thorium(11-12 ppm)suggesting that the variations were caused by environmental change related to the land modification.Abrupt projection of total sulfur(TS)contents in this profile is suggestive of an excess supply of common fertilizer such as sulfate ammonium,of which the event was coincident to an extinction of fishes in 1988.In contrast to the decline of TS,phosphorus increased steadily indicating switching of aglochemicals.
掲載誌名
島根大学地球資源環境学研究報告
19
開始ページ
47
終了ページ
55
ISSN
13439774
発行日
2000-12-25
NCID
AA11455176
出版者
島根大学総合理工学部地球資源環境学教室
出版者別表記
Department of Geoscience, Interdisciplinary Faculty of Science and Engineering, Shimane University
資料タイプ
紀要論文
部局
(旧組織)大学院総合理工学研究科
備考
12-14,16+ / 1993+
徳岡隆夫教授退官記念論誌集