A variety of air-photo interpretation criteria need to be used for detecting areas of potential subsidence. An initial step is to search for past failures showing on air photographs, to establish the cause and to interpret the boundaries of the environment that might be affected. Causes detectable include karstic terrain, areas liable to piping, or containing concealed peat, old shafts, and stratiform or vein workings. Airborne imaging conditions can be selected to improve the possibility of detection in some situations. The technique can indicate situations where risks are high, but cannot be used to map with certainty voids liable to collapse. (A) /TRRL/

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  • Corporate Authors:


    Radarweg 29
    Amsterdam,   Netherlands  1043 NX
  • Authors:
    • Norman, J W
    • Watson, I
  • Publication Date: 1975

Media Info

  • Features: Figures; Photos; References;
  • Pagination: p. 359-381
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00137487
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Oct 6 1976 12:00AM