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ID 20440
Eprint ID
20440
Title Alternative
Analysis of the Rains Falling in the Mountain-side of the Chugoku District
Author
Tara, Masanobu
Funatsu, Yoritoshi
Abstract
More than 30 years ago, the pine trees in the mountain-side of the Chugoku district in Japan, started to die. Since then, a lot of pine trees have continued to die, and the damage area was spreading out even now. It is considered that one of the reason on the death of the pine trees might be "the acid rain" falling in the district. The rains and the underground water at Daikinya, Kuse-cho, Maniwa-gun, Okayama Pref. in the district were analyzed chemically by Funatsu in 1995-1997; the conductivity, the density of nitric ion (N0(3)(-)) and sulfuric ion (SO(4)(2-)), and the acidity (pH) in the rains were thus observed. In the present paper the results of the analysis on the rains have been reported. (1) The conductivity varied 4.2-197.0 μs/cm, and the average was 39.0. (2) The density of nitric ion (NO(3)(-)) varied 1.6-84.2 ppm, and the average was 22.4. (3) The acidity (pH) varied 3.7-7.5, and the average was 4.9. The acid rains falling continuously in this district in the past two years were confirmed.
Note
論文
Published Date
1998-08
Publication Title
環境制御
Publication Title Alternative
Environmental Research and Control
Volume
volume20
Publisher
岡山大学環境管理センター
Publisher Alternative
Okayama University Administration Center for Environmental Science and Technology
Start Page
11
End Page
16
ISSN
0917-1533
NCID
AN1024789X
Content Type
Departmental Bulletin Paper
language
日本語
File Version
publisher
Refereed
True
Eprints Journal Name
erc