ID | 13888 |
JaLCDOI | |
Sort Key | 3
|
Title Alternative | Relationship between the water quality of three main rivers and geology of Okayama Prafecture
|
FullText URL | |
Author |
Kinoshita, takuya
Matsuda, Toshihiko
|
Abstract | Concentrations of inorganic major components (Ca2+, Mg2+, Na+, K+, ΣFe, AI3+, HCO3, SO4, CI-, NO3, F- and SiO2) were measured in 57 water samples from three main rivers, the Yoshii, Asahi and Takahashi Rivers and their tributaries. The water quality is discussed in relation to the geological environment in the drainage basin of three rivers. The following results were obtained from the investigation. The degree of influence of rocks on the water quality was limestone≫basic rocks>clastic rocks>andesite>rhyolite>gramite. The influence of geology is clear in the riverhead but it is obscure in the downstream. The concentration of each component increases generally from the upper stream to the lower stream but that of SiO2 only decreases in the lower stream. Kaolinite is a stable mineral as a weathering prodouct from the ion compositions of three rivers. In a rough estimation, Yoshii, Asahi and Takahashi Rivers weather 303,000t, 433,000t and 1,033,000t of the rocks respectively from their basins in a year. The syrface of their basins are scraoed off 0.06mm, 0.11mm and 0.15mm respectively in a year.
|
Keywords | Water quality
River water
Geology of basin
Yoshii River
Asahi River
Takahashi River
Okayama Prefecture
|
Publication Title |
Okayama University Earth Science Report
|
Published Date | 2001-09-20
|
Volume | volume8
|
Issue | issue1
|
Publisher | 岡山大学理学部地球科学教室
|
Publisher Alternative | Department of Earth Sciences Faculty of Science, Okayama University
|
Start Page | 29
|
End Page | 38
|
ISSN | 1340-7414
|
NCID | AN10506284
|
Content Type |
Departmental Bulletin Paper
|
OAI-PMH Set |
岡山大学
|
language |
Japanese
|
Copyright Holders | 岡山大学地球科学研究報告編集委員会
|
File Version | publisher
|
NAID | |
Eprints Journal Name | esr
|