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LIOS TECHNOLOGY
Fibre-Optic Distributed Temperature Sensing Technology Demonstration and Evaluation Project in Environmental Engineering

Fibre-Optic Distributed Temperature Sensing Technology Demonstration and Evaluation Project in Environmental Engineering

New geophysical methods are required for monitoring hydrologic processes at the catchment and larger scales, and for quantifying fluxes between ground water and surface water.

Fibre-optic distributed temperature sensing (FO-DTS) is an emerging technology that has promise for characterizing estuary-aquifer and stream-aquifer interaction and for identifying transmissive fractures in bedrock boreholes. Although routinely used for monitoring temperature and (or) strain in petroleum wells, FO-DTS applications in hydrology are uncommon.

In the spring of 2006, with support from the USGS Ground-Water Resources Program, the USGS Office of Ground Water, Branch of Geophysics began a six-month FO-DTS technology demonstration/evaluation project. As part of this project, several FO-DTS pilot studies were conducted at the 100-meter to kilometer scales. Study goals included evaluating the use of FO-DTS for:

  • mapping submarine ground-water discharge,
  • identifying gaining stream reaches, and
  • identifying transmissive fractures in boreholes.

 

Monitor Coastal Aquifer Dynamics

Monitoring Coastal Aquifer Dynamics

USGS Ground-Water Resources Program