Field Trials of Chaotic Advection to Enhance Reagent Delivery
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Effective mixing in the subsurface remains one of the biggest challenges in in situ remediation. Chaotic advection is a novel approach that has the potential to enhance contact between an injected reagent and target contaminants, and thereby improve the effectiveness of in situ treatment technologies.

One configuration that can generate chaotic advection is termed the rotated potential mixing (RPM) flow. A conventional RPM flow system involves periodically re-oriented dipole flow driven by transient switching of pressures at a series of radial wells. To determine whether chaotic advection can be engineered using such an RPM flow system, and to assess the consequent impact on the spatial distribution of a conservative tracer, a series of field-scale experiments were conducted. The presentation will highlight key results from the field tests which demonstrated that chaotic advection can be engineered at the field scale, and that this engineered mixing led to improved lateral tracer spreading and approximately uniform concentrations across the monitoring network. This investigation is a critical step in the development of chaotic advection as a viable and efficient approach to enhance reagent delivery.

Publication Summary

  • Geosyntec Authors: Michelle S. Cho
  • All Authors: Michelle S. Cho; Felipe Solano, Canada; Neil R. Thomson, Canada; Michael G. Trefry, Australia; Daniel R. Lester, Australia; Guy Metcalfe, Australia
  • Title: Field Trials of Chaotic Advection to Enhance Reagent Delivery
  • Event or Publication: 10th International Groundwater Quality Conference (GQ 2019)
  • Practice Areas: Water and Natural Resources
  • Citation: Julie Konzuk, Ph.D., PEng, (Ontario), Michelle Cho, Ph.D. (Ontario), and Frederic Cosme, CPEng, Ir. (Melbourne, Australia) will present at the 10th International Groundwater Quality Conference (GQ 2019) at the University of Liege Auditorium 500 in Liege, Belgium on September 9-12, 2019.
  • Date: 8:55-10:10 a.m., Thursday, September 12, 2019
  • Location: Liege, Belgium