Monitoring technique of freshwater/ saltwater interface level using time domain reflectometry

• Project/Area Number: 22780220
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Irrigation, drainage and rural engineering/Rural planning
• Research Institution: Saga University
• Principal Investigator: ITO Yuji 佐賀大学, 低平地沿岸海域研究センター, 研究機関研究員 (60526911)
• Project Period (FY): 2010 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2011: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000); Fiscal Year 2010: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: マイクロ波 / 塩水化 / モニタリング / 地下水 / 淡水資源 / 時間領域反射法(TDR) / 海水侵入 / 電気伝導度 / 沿岸域 / 観測井戸 / 室内実験

Research Abstract

To establish a monitoring technique for salinization of freshwater resources stored in a coastal aquifer, a novel probe to measure freshwater/ saltwater interface level was developed and the effectiveness of the probe was examined through the laboratory experiment. The interface was hypothetically produced in the experimental column and the level variation was measured by the probe which was set at center of the column. The results showed that the level can be measured with the probe when the interface was produced clearly in the column. We concluded that the developed probe is useful for monitoring the salinization of freshwater resources in a coastal aquifer.

Research Products

• [Journal Article] マイクロ波を利用した淡水の水位・電気伝導度および淡塩水境界位の計測システム (2011)
  • Author(s): 伊藤祐二, 郡山益実, 宮本英揮, 梅谷知弘, 筑紫二郎
  • Journal Title: 水文・水資源学会誌 Volume: 24巻 Pages: 170-176
  • NAID: 10028224567
  • Peer Reviewed
• [Journal Article] マイクロ波を利用した淡水の水位・電気伝導度および淡塩水境界位の計測システム (2011)
  • Author(s): 伊藤祐二
  • Journal Title: 水文・水資源学会誌 Volume: 24 Pages: 170-176
  • NAID: 10028224567
  • Peer Reviewed
• [Journal Article] マイクロ波のエネルギー吸収特性を利用した淡塩水境界面の計測 (2010)
  • Author(s): 伊藤祐二, 宮本英揮, 郡山益実, 筑紫二郎, 瀬口昌洋
  • Journal Title: 土木学会論文集B Volume: 66巻 Pages: 189-195
  • NAID: 130004468107
  • Peer Reviewed
• [Journal Article] マイクロ波のエネルギー吸収特性を利用した淡塩水境界面の計測 (2010)
  • Author(s): 伊藤祐二
  • Journal Title: 土木学会論文集B Volume: Vol.66 Pages: 189-195
  • NAID: 130004468107
  • Peer Reviewed
• [Presentation] Time domain reflectometry application to measurements of groundwater level and freshwater/ saltwater interface level in sandy layer (2011)
  • Author(s): Ito, Y., Yasuda, H., Nakagawa K., Kawai T., and Chikushi J.
  • Organizer: ASA・CSSA・SSSA International Annual Meetings
  • Place of Presentation: San Antonio
  • Year and Date: 2011-10-19
• [Presentation] Time domain reflectometry application to measurements of groundwater level and freshwater/saltwater interface level in sandy layer (2011)
  • Author(s): ITO Y.
  • Organizer: ASA・CSSA・SSSA International Annual Meetings
  • Place of Presentation: San Antonio, Texas
  • Year and Date: 2011-10-19
• [Presentation] 淡塩水境界位計測のための同軸型TDRプローブの開発 (2011)
  • Author(s): 伊藤祐二, 郡山益実, 宮本英揮, 筑紫二郎
  • Organizer: 平成23年度農業農村工学会
  • Place of Presentation: 福岡
  • Year and Date: 2011-09-06
• [Presentation] 淡塩水境界位計測のための同軸型TDRプローブの開発 (2011)
  • Author(s): 伊藤祐二
  • Organizer: 平成23年度農業農村工学会
  • Place of Presentation: 福岡市(九州大学箱崎キャンパス)
  • Year and Date: 2011-09-06
• [Patent(Industrial Property Rights)] 淡塩水境界面の測定方法 (2010)
  • Inventor(s): 伊藤祐二,宮本英揮
  • Industrial Property Rights Holder: 九州大学
  • Industrial Property Number: 2010-182921
  • Filing Date: 2010-08-18
• [Patent(Industrial Property Rights)] 淡塩水境界面の測定方法 (2010)
  • Inventor(s): 伊藤祐二
  • Industrial Property Rights Holder: 九州大学
  • Industrial Property Number: 2010-182921
  • Filing Date: 2010-08-18