Multi-scale roughness spectra of Mount St. Helens debris flows

Details Multi-scale roughness spectra of Mount St. Helens debris flows Multi-scale roughness spectra of Mount St. Helens debris flows

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20.1603a&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 15, p. 1603-1606.

Physics

2

Radar Imagery, Surface Roughness, Terrain, Topography, Volcanoes, Debris, Fractals, Profilometers, Radar Scattering, Spectrum Analysis

Scientific paper

A roughness spectrum allows surface structure to be interpreted as a sum of sinusoidal components with differing wavelengths. Knowledge of the roughness spectrum gives insight into the mechanisms responsible for electromagnetic scattering at a given wavelength. Measured spectra from 10-year-old primary debris flow surfaces at Mount St. Helens conform to a power-law spectral model, suggesting that these surfaces are scaling over the measured range of spatial frequencies. Measured spectra from water-deposited surfaces deviate from this model.

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