Dynamic consolidation measurements in a well field using fiber bragg grating sensors

Sandra Drusová*, R. Martijn Wagterveld, Adam D. Wexler, Herman L. Offerhaus

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

Currently available groundwater flow prediction tools and methods are limited by insufficient spatial resolution of subsurface data and the unknown local heterogeneity. In this field study, fiber Bragg grating (FBG) sensors were installed in an extraction well field to investigate its potential to measure groundwater flow velocity. Reference in-situ pore pressure and temperature measurements were used to identify possible sources of FBG responses. FBG strain sensors were able to detect soil consolidation caused by groundwater extraction from 250 m distance. The results show that FBG responses were influenced by interface friction between soil and FBG packaging. FBG packaging slipped in soil and the effect was more pronounced during higher groundwater flow around a nearby well. These FBG fibers could be applied for indirect flow monitoring that does not require any tracer and provide real-time and long-term data during regular operation of extraction wells.

Original languageEnglish
Article number4403
JournalSensors (Switzerland)
Volume19
Issue number20
DOIs
Publication statusPublished - 11 Oct 2019

Keywords

  • Consolidation
  • FBG packaging
  • Fiber Bragg grating
  • Groundwater extraction
  • groundwater extraction
  • fiber Bragg grating
  • consolidation

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