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Instrumentation of avalanche sites: the main microstructural and mechanical characteristics of snow.

Instrumentation d'un site avalancheux : les principales caractéristiques microstructurales et mécaniques de la neige.

Author(s) : MARCO O.

Type of article: Periodical article

Summary

The first part of the study describes the physical properties of snow: size grading, density, porosity, liquid water quantity, compressibility, plasticity, viscosity. Then the paper reviews the previous measurements and deals with acoustics properties and the attempted applications of models proposed by Zwikken and Kosten, then by Attenborough, for low density snow. An extrapolation from these methods to compact snow is provided with the description of the sampling range, measurement procedure and the results obtained from the comparison of acoustic properties with sample densities. We conclude the aforementioned models are generally applicable, on the grounds of a good correlation between accoustic porosities and snow gravimetry. Therefore, within certain limits, snow density can be determined from acoustic property measurements, which are easier to do, at least for fixed snow, i.e., regular snow surface.

Details

  • Original title: Instrumentation d'un site avalancheux : les principales caractéristiques microstructurales et mécaniques de la neige.
  • Record ID : 1997-0010
  • Languages: French
  • Source: Cemagref, Etudes, Equip. Eau Environ. - n. 16
  • Publication date: 1995
  • Document available for consultation in the library of the IIR headquarters only.

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