| Item type |
紀要論文 / Departmental Bulletin Paper(1) |
| 公開日 |
2011-10-04 |
| タイトル |
|
|
タイトル |
岩手県北部の大規模トンネルで観測される湧水の地球化学的特徴とその起源 |
| その他のタイトル |
|
|
その他のタイトル |
Geochemical characteristics and origin of groundwater draining into a large-scale tunnel, northern part of Iwate Prefecture |
| 言語 |
|
|
言語 |
jpn |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
departmental bulletin paper |
| 作成者 |
川原谷, 浩
三浦, 理司
松葉谷, 治
石山, 大三
Kawaraya, Hiroshi
Miura, Hiroshi
Matsubaya, Osamu
Ishiyama, Daizo
|
| 内容記述 |
|
|
内容記述タイプ |
Other |
|
内容記述 |
The purpose of this study is to investigate sources and style of migration of spring water discharging from fracture zones in a large-scale tunnel occurring at 150 to 200 meters below the surface of the ground. The water samples collected were spring water 200 meters below the surface and subsurface water 100 meters below the surface in the tunnel, well water, river water and precipitations. The properties of the water samples are discussed on the basis of concentrations of the major chemical components, including Na⁺, K⁺, Ca²⁺, Mg²⁺, Cl⁻, NO₃⁻, SO₄²⁻ and HCO₃⁻ and the oxygen and hydrogen isotopic ratios of those water.
The oxygen and hydrogen isotopic ratios of the spring water in the tunnel have almost constant values of δ¹⁸O= -11.0 ‰ and δD= -70 ‰, respectively, and the isotopic ratios are lower than those of subsurface water, well water, river water and precipitations. On the other hand, the oxygen and hydrogen isotopic ratios of subsurface water show weak seasonal variation. The residence time of the spring water in the tunnel is estimated to be about over 2years. Based on the results of concentration ratio for major chemical components of water in the area, river water and well water having a short residence time and spring water having a long residence time. The subsurface water is thought to have been formed by water/rock interaction between water of meteoric origin with Quaternary and Tertiary volcanics in a short time, while the spring water is thought to be water formed by reaction of subsurface water with Paleozoic ～ Mesozoic to Quaternary strata over a long period. |
| 出版タイプ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 書誌情報 |
秋田大学大学院工学資源学研究科研究報告
en : Scientific and technical reports of Graduate school of Engineering and Resource Science, Akita University
巻 31,
p. 47-53,
発行日 2010-10-29
|
| ISSN |
|
|
収録物識別子タイプ |
ISSN |
|
収録物識別子 |
21861382 |
| NCID |
|
|
収録物識別子タイプ |
NCID |
|
収録物識別子 |
AA12500403 |
| 出版者 |
|
|
出版者 |
秋田大学大学院工学資源学研究科 |
kogaku31(47).pdf (702.7 kB)
