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Detecting Badger Tunnels |
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Techniques employed: Ground probing radar (GPR) Client: RPS Consultants, Ashford GPR is frequently the most successful technique in mapping the extent of badger sets. Badgers often excavate their sets beneath access roads causing concern to the stability of the road and the safety of the badgers themselves. GPR allows a high resolution survey to locate the extent and depth of the tunnels so that an investigation strategy can be planned. |
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A particular example in Kent involved a contractor inadvertently running construction traffic over a badger set. The survey was undertaken to assess what damage, if any, had been sustained to the set. |
 500MHz antenna being used over badger set. A tunnel entrance can be seen in the foreground |
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 General view of the area |
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The interpretation below indicates that most of the set appeared to be intact though some of the peripheral tunnels may have sustained damage. It is interesting to note the increased resolution provided by radar transects at 0.5m orthogonal as opposed to 1m orthogonal as demonstrated in the time slices. |
 Manual abstraction of radar anomalies over a badger set with time slice plots shown to the right |
 Time slice plot of 1m orthogonal survey over full depth range of 0.1m to 1.4m with area of 0.5m survey highlighted |
 Time slice plot of 0.5m orthogonal survey over full depth range of 0.1m to 1.4m |
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