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ID 17626
Eprint ID
17626
FullText URL
Thumnail 85_601.pdf 313 KB
Title Alternative
Surveys on the water pollution of Lake Kojima
Author
Kanemasa, Yasuhiro
Katayama, Takeshi
Okabe, Akinobu
Mori, Yasumi
Abstract
For the purpose of clarifying the water pollution of Lake Kojima, two samples of water were collected and analyzed from each surface and bottom at 7 different parts in the lake. The results are summarized as follows. 1. The lake has been remarkably tainted with organic substances as grasped from the result of COD. 2. There were nutritious salts in high concentration, consequently accelerating a eutrophication. Especially, the bottom water contained a large quantity of NH(4+) because of anaerobic decomposition. 3. In summer, an overgrowth of phytoplankton was observed and pH of surface water shifted to respectable alkaline in consequence. 4. The conversion of Lake Kojima to fresh-water had not been succeeded. For the preventive measure of eutrophication, the exhaust of nitrogen and phosphorus compounds should be controled. If not so, the condition of Lake Kojima will turn to inappropriate to fish subsistence.
Published Date
1973-12-30
Publication Title
岡山医学会雑誌
Publication Title Alternative
Journal of Okayama Medical Association
Volume
volume85
Issue
issue11-12
Publisher
岡山医学会
Publisher Alternative
Okayama Medical Association
Start Page
601
End Page
605
ISSN
0030-1558
NCID
AN00032489
Content Type
Journal Article
Official Url
https://www.jstage.jst.go.jp/article/joma1947/85/11-12/85_11-12_601/_article/-char/ja/
Related Url
http://www.okayama-u.ac.jp/user/oma/
language
日本語
Copyright Holders
岡山医学会
File Version
publisher
Refereed
True
Eprints Journal Name
joma