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Dynamics of Unusual Debris Flows on Martian Sand DunesGullies that dissect sand dunes in Russell impact crater often display debris flow-like deposits in their distal reaches. The possible range of both the rheological properties and the flow rates are estimated using a numerical simulation code of a Bingham plastic flow to help explain the formation of these features. Our simulated results are best explained by a rapid debris flow. For example, a debris flow with the viscosity of 10(exp 2) Pa s and the yield strength of 10(exp 2) Pa can form the observed deposits with a flow rate of 0.5 cu m/s sustained over several minutes and total discharged water volume on the order of hundreds of cubic meters, which may be produced by melting a surface layer of interstitial ice within the dune deposits to several centimeters depth.
Document ID
20070030116
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Miyamoto, Hideaki (Arizona Univ. Tucson, AZ, United States)
Dohm, James M. (Arizona Univ. Tucson, AZ, United States)
Baker, Victor R. (Arizona Univ. Tucson, AZ, United States)
Beyer, Ross A. (Arizona Univ. Tucson, AZ, United States)
Bourke, Mary (Planetary Science Inst. Tucson, AZ, United States)
Date Acquired
August 24, 2013
Publication Date
July 8, 2004
Publication Information
Publication: Geophysical Research Leters
Volume: 31
ISSN: 0094-8276
Subject Category
Geophysics
Funding Number(s)
CONTRACT_GRANT: NNG04GJ92G
Distribution Limits
Public
Copyright
Other