The Case of Dam Monitoring by GPS in NUMAHARA Dam

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  • KITA Yusuke
    電源開発株式会社 設備企画部 計画グループ (前 水力エンジニアリング部 土木技術室)
  • MIZUTA Shinji
    電源開発株式会社 石川石炭火力発電所 海水揚水グループ (前 沼原電力所)
  • EBARA Masahiko
    電源開発株式会社 水力エンジニアリング部

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  • 沼原ダムにおけるGPSを用いた堤体挙動測定
  • ヌマ ハラ ダム ニ オケル GPS オ モチイタ テイタイ キョドウ ソクテイ

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Abstract

Our company began the dam displacement monitoring by GPS system applied in Numahara dam located in the Tochigi Prefecture since September, 2007. It aimed to verify the applicability of GPS in snow area, and to compare to traditional collimation method. As a result, the GPS data was high accuracy, although the sensor icing and the frost heaving occurred. And the GPS measured the detail displacement of dam during evacuation and re-storage, which could hardly measure by collimation.

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