MOTION OF SNOW AVALANCHES IN THE CONDITIONS OF LIMITING FRICTION

The equations of motion of large snow avalanches are investigated, taking into account the fact that the dry friction can reach a critical value above which the snow in the avalanche or the underlaying material cannot sustain the friction. Asymptotic solutions are found for long times after the part of the snow moves in the conditions of limiting friction over a tilted plane with a uniform layer of snow. The equations which are used to find these asymptotic solutions have the property that for certain depths the flow velocity of small perturbations decreases with increasing depth. In particular, on relatively gentle slopes two zones are formed in the avalanche: the forward part, with a large velocity and thickness of the moving layer, and the rear part, which is significantly slower and thinner. The two parts are separated by a narrow region characterized by a sharp decline in velocity and thickness of the moving layer.

  • Corporate Authors:

    Plenum Publishing Company

    227 West 17th Street
    New York, NY  USA  10011
  • Authors:
    • Danilova, E M
    • Eglit, M E
  • Publication Date: 1977-9

Media Info

  • Pagination: p. 666-672
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00183341
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Nov 14 1978 12:00AM