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GEOPHYSICAL RESEARCH LETTERS, VOL. ???, XXXX, DOI:10.1029/, A Physical Model for Seismic Noise Generation from Sediment
 

Summary: GEOPHYSICAL RESEARCH LETTERS, VOL. ???, XXXX, DOI:10.1029/,
A Physical Model for Seismic Noise Generation from Sediment
Transport in Rivers
Victor C. Tsai1,2
, Brent Minchew1,2
, Michael P. Lamb2
, and Jean-Paul Ampuero1,2
Measuring sediment flux in rivers remains a significant problem
in studies of landscape evolution. Recent studies suggest that ob-
servations of seismic noise near rivers can help provide such mea-
surements, but the lack of models linking observed seismic quan-
tities to sediment flux has prevented the method from being used.
Here, we develop a forward model to describe the seismic noise
induced by the transport of sediment in rivers. The model pro-
vides an expression for the power spectral density (PSD) of the
Rayleigh waves generated by impulsive impacts from saltating par-
ticles which scales linearly with the number of particles of a given
size and the square of the linear momentum. After incorporating
expressions for the impact velocity and rate of impacts for flu-
vially transported sediment, we observe that the seismic noise PSD

  

Source: Ampuero, Jean Paul - Division of Geological and Planetary Sciences, California Institute of Technology

 

Collections: Geosciences