Journal of the Korean GEO-environmental Society (한국지반환경공학회 논문집)

Korean Geo-Environmental Society (한국지반환경공학회)
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Delineation of Groundwater and Estimation of Seepage Velocity Using High-Resolution Distributed Fiber-Optic Sensor

  • Chang, Ki-Tae (Department of Civil Engineering, Kumoh National Institute of Technology) ;
  • Pham, Quy-Ngoc (Department of Reservoir Geology, Vietnam Petroleum Institute)
  • Received : 2015.03.27
  • Accepted : 2015.05.15
  • Published : 2015.06.01
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Abstract

This study extends the Distributed Temperature Sensing (DTS) application to delineate the saturated zones in shallow sediment and evaluate the groundwater flow in both downward and upward directions. Dry, partially and fully saturated zones and water level in the subsurface can be recognized from this study. High resolution seepage velocity in vertical direction was estimated from the temperature data in the fully saturated zone. By a single profile, water level can be detected and seepage velocity in saturated zone can be estimated. Furthermore, thermal gradient analysis serves as a new technique to verify unsaturated and saturated zones in the subsurface. The vertical seepage velocity distribution in the recognized saturated zone is then analyzed with improvement of Bredehoeft and Papaopulos' model. This new approach provides promising potential in real-time monitoring of groundwater movement.

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References

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