Borehole radar detects major fracture zones near a borehole at a Superfund site in southeastern New Hampshire. The fracture zone that intersects the borehole at a depth of 75 meters (indicated by arrow) reportedly yielded more than 1,000 liters per minute (Lane and others, 1994).
Comparison of fracture orientation determined from acoustic televiewer and borehole radar at an Air Force facility in northeastern Maine (Lane and others, 1996). Blue indicates transmissive zone as determined by heat-pulse flow measurements.
Borehole radar before and after injection of saline tracer at the fractured-bedrock research site in central New Hampshire (Land and others, 1966). Fracture zones that intersect the well at 39 and 44 meters (indicated by arrows) are major pathways for movement of the saline tracer.
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