精密重力測定による別府地域の地下水変動の研究 A Study of Groundwater Variations in Beppu Area by Means of the Precise Gravity Measurements

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著者

    • HUNT Trevor
    • 京都大学理学部附属地球物理学研究施設 Beppu Geophysical Research Laboratory, Kyoto University

抄録

The effects of groundwater variations upon gravity are one of the large noise sources which are generally removed from high-precision gravity measurements using superconducting gravimeters or absolute gravimeters. These effects, on the other hand, give us ;important information about the hydrological characteristics in the area concerned. Precise gravity measurements have been repeatedly carried out at Beppu, in order to detect the gravity changes associated with groundwater variations. Using a LaCoste & Romberg gravimeter (G-534), 31 microgravity surveys were made at about 1-monthintervals from February 1993 to February 1996, at 11 survey marks in the Beppu area . The observations were reduced using standard precise gravity techniques and the method of Principal Component Analysis (PCA) was employed to expand the observed gravity changes into the time-space domain. The result shows that; (1) the 1st and the 2nd components of PCA explain more than 85% of the variations, (2) the variations of the 1st component (58.3%) represent shallow unconfined water level changes, and (3) the 2nd component (27.4%) is possibly explained by deeper groundwater movements and associated ground level changes.

収録刊行物

  • 測地学会誌

    測地学会誌 42(2), 85-97, 1996-09-25

    The Geodetic Society of Japan

参考文献:  11件中 1-11件 を表示

被引用文献:  1件中 1-1件 を表示

  • 浅層水理の重力モニタリング

    杉原 光彦 , 宮崎 純一

    物理探査学会学術講演会講演論文集 = Proceeding of the SEGJ Conference 99, 256-260, 1998-10

    参考文献11件 被引用文献2件

各種コード

  • NII論文ID(NAID)
    10003709674
  • NII書誌ID(NCID)
    AN00134900
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    00380830
  • NDL 記事登録ID
    4045626
  • NDL 雑誌分類
    ZM41(科学技術--地球科学)
  • NDL 請求記号
    Z15-161
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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