MISC

2008年

Simultaneous monitoring of gas concentration and groundwater level at the Omaezaki 500-m well, central Japan: Spike-like concentration change of methane

GEOCHEMICAL JOURNAL
  • Fumiaki Tsunomori
  • ,
  • Kenji Notsu

42
1
開始ページ
85
終了ページ
91
記述言語
英語
掲載種別
DOI
10.2343/geochemj.42.85
出版者・発行元
GEOCHEMICAL SOC JAPAN

Simultaneous monitoring of the gas concentration and water level in groundwater was achieved at the Omaezaki open well. Coaxially arranged pipes inserted into the well enabled us to pump groundwater directly from an aquifer and to return it the aquifer without disturbing the groundwater level. Concentration of methane, as one subsurface-origin gas, Was monitored using a quadrupole mass spectrometer equipped with a gas separation tube. The methane concentration intermittently showed spike-like increases during the observation period. The temporal change of the methane concentration was independent of the seismic activity around the station, the groundwater temperature, the ambient temperature, and the pumping rate, with the exception of the groundwater level. The methane concentration was associated with the difference of the groundwater level, of which the amplitude of a barometric response is greater than that of a tidal one. Spike-like increases of the methane concentration were explained using a logistic model as a function of the groundwater level change.

Web of Science ® 被引用回数 : 8

リンク情報
DOI
https://doi.org/10.2343/geochemj.42.85
CiNii Articles
http://ci.nii.ac.jp/naid/10021093041
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000261047400008&DestApp=WOS_CPL
ID情報
  • DOI : 10.2343/geochemj.42.85
  • ISSN : 0016-7002
  • eISSN : 1880-5973
  • CiNii Articles ID : 10021093041
  • Web of Science ID : WOS:000261047400008

エクスポート
BibTeX RIS