Dynamics of unusual debris flows on Martian sand dunes
Citation:
Miyamoto, H., Dohm, J. M., Baker, V.R., Beyer, R.A. and Bourke, M.C, Dynamics of unusual debris flows on Martian sand dunes, Geophysical Research Letters, 31, 13, 2004Download Item:
Abstract:
Gullies 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
2
Pa s
and the yield strength of 10
2
Pa can form the observed
deposits with a flow rate of 0.5 m
3
/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.
I
NDEX
T
ERMS
:
1824 Hydrology: Geomorphology (1625); 1823 Hydrology:
Frozen ground; 1625 Global Change: Geomorphology and
weathering (1824, 1886); 6207 Planetology: Solar System
Objects: Comparative planetology; 6225 Planetology: Solar
System Objects: Mars.
Author's Homepage:
http://people.tcd.ie/bourkem4Description:
PUBLISHED
Author: BOURKE, MARY
Type of material:
Journal ArticleCollections
Series/Report no:
Geophysical Research Letters31
13
Availability:
Full text availableSubject (TCD):
Smart & Sustainable PlanetDOI:
https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2004GL020313Metadata
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