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Measuring Thaw Depth Beneath Peat-Lined Arctic Streams Using Ground-Penetrating Radar
Hydrological Processes
  • John H. Bradford, Boise State University
  • James P. McNamara, Boise State University
  • William Bowden, University of Vermont
  • Michael N. Gooseff, Utah State University
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In arctic streams, depth of thaw beneath the stream channel is likely a significant parameter controlling hyporheic zone hydrology and biogeochemical cycling. As part of an interdisciplinary study of this system, we conducted a field investigation to test the effectiveness of imaging substream permafrost using ground-penetrating radar (GPR). We investigated three sites characterized by low-energy water flow, organic material lining the streambeds, and water depths ranging from 0·2 to 2 m. We acquired data using a 200 MHz pulsed radar system with the antennas mounted in the bottom of a small rubber boat that was pulled across the stream while triggering the radar at a constant rate. We achieved excellent results at all three sites, with a clear continuous image of the permafrost boundary both peripheral to and beneath the stream. Our results demonstrate that GPR can be an effective tool for measuring substream thaw depth.
Citation Information
John H. Bradford, James P. McNamara, William Bowden and Michael N. Gooseff. "Measuring Thaw Depth Beneath Peat-Lined Arctic Streams Using Ground-Penetrating Radar" Hydrological Processes (2005)
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