REMOTE SENSING AND LANDSLIDE HAZARD ASSESSMENT

Remotely acquired multispectral data are used to improve landslide hazard assessments at all scales of investigation. A vegetation map produced from automated interpretation of TM data is used in a GIS context to explore the effect of vegetation type on debris flow occurrence in preparation for inclusion in debris flow hazard modeling. Spectral vegetation indices map spatial patterns of grass senescence which are found to be correlated with soil thickness variations on hillslopes. Grassland senescence is delayed over deeper, wetter soils that are likely debris flow source areas. Prediction of actual soil depths using vegetation indices may be possible up to some limiting depth greater than the grass rooting zone. On forested earthflows, the slow slide movement disrupts the overhead timber canopy, exposes understory vegetation and soils, and alters site spectral characteristics. Both spectral and textural measures from broad band multispectral data are successful at detecting an earthflow within an undisturbed old-growth forest.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00991112
• Corporate Authors:

  American Society for Photogrammetry and Remote Sensing

  5410 Grosvenor Lane, Suite 210
  Bethesda, MD  United States  20814-2160
• Authors:
  • MCKEAN, J
  • Buechel, S
  • Gaydos, L
• Publication Date: 1991-9

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 1185-93
• Serial:
  • Photogrammetric Engineering and Remote Sensing
  • Volume: 57
  • Issue Number: 9
  • Publisher: American Society for Photogrammetry and Remote Sensing
  • ISSN: 0099-1112

Subject/Index Terms

• TRT Terms: Earth movements (Geophysics); Geological surveying; Imagery; Landslides; Mapping; Remote sensing; Soil densification; Soils; Thickness; Vegetation
• Uncontrolled Terms: Earth movements; Multispectral imagery
• Old TRIS Terms: Earth slides; Geologic mapping; Soil thickness
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00616732
• Record Type: Publication
• Files: TRIS
• Created Date: Nov 30 2003 12:00AM