Influence of large scale tunnel digging and drainage on groundwater
Project/Area Number |
23510007
|
Research Category |
Grant-in-Aid for Scientific Research (C)
|
Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Environmental dynamic analysis
|
Research Institution | Wakayama University |
Principal Investigator |
II Hiroyuki 和歌山大学, システム工学部, 教授 (60283959)
|
Project Period (FY) |
2011 – 2013
|
Project Status |
Completed (Fiscal Year 2013)
|
Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2011: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
|
Keywords | 地下水 / 地下水流動 / 酸素同位体比 / 排水 / トンネル掘削 / トリチウム / 海藻 / 蒸発率 / トンネル / 環境同位体 / 鉱山 / 湧水 / 水生昆虫 / 有効間隙率 / 同位体 / 年代測定 / トンネル湧水 / トンネル排水量 |
Research Abstract |
Influence of long term drainage of tunnel seepage on groundwater system was studied at Matumoto-Shiroyama Tunnel. Although 10 million m3 tunnel seepage water has been drained for 24 years, 3H concentration has kept low and oxygen isotope values have been uniform. Therefore, recharged water before the tunnel construction was thought to be drained. The 10 million m3 tunnel seepage water was only 22% of all porosity in sediment between the tunnel level and surface. It needs more 80 years to perfect drain of all pore water in sediment. It has been clarified that evaporation rate can be estimated from oxygen isotope under low humid condition. At the surrounding of large scale digging, Namariyama mine area, high concentration of Zinc for seaweed was found. The drainage water from the plugged tunnel welled up at the coast and the drainage water derived from mine tunnel was high concentration of metal.
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Report
(4 results)
Research Products
(26 results)
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[Book] 全世界の河川事典2013
Author(s)
高橋裕(編集委員長)、井伊博行(一部担当)
Total Pages
1040
Publisher
丸善出版
Related Report
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