2003 Seattle Annual Meeting (November 25, 2003)
Paper No. 26-1
Presentation Time: 8:00 AM-12:00 PM

GIS MODELING AND ANALYSIS OF BRANCHING VALLEY NETWORK DISTRIBUTION ON MARS

BAKER, Leslie and SPRENKE, Kenneth, Dept. of Geological Sciences, Univ of Idaho, Moscow, ID 83844-3022, lbaker@uidaho.edu

Branching valley networks in the Martian highlands may have formed as a result of rainfall and surface runoff, or they may have formed from other processes on a Mars without stable liquid water on its surface. New, detailed MOLA data make this question an ideal one for hydrologic analysis using GIS (e.g. Luo 2002). If ancient Mars was relatively warm and wet, with abundant precipitation, then the distribution of stream valley networks should be replicable by hydrologic runoff modeling. Valley networks produced by other processes would not necessarily be well modeled in this way. In addition, valley network distribution should display orographic effects resulting from the Martian topography existing at the time of valley formation. A preliminary valley network model produced in Arc/INFO matches actual imaged valley networks in some portions of the Martian highlands but not in others. An improved model may demonstrate topographic influences on valley network distribution.

Luo W (2002) JGR-Planets 107, 5071, doi: 10.1029/2001JE0015000.

2003 Seattle Annual Meeting (November 25, 2003)
Session No. 26--Booth# 5
Planetary Geology (Posters)
Washington State Convention and Trade Center: Hall 4-F
8:00 AM-12:00 PM, Sunday, November 2, 2003

Geological Society of America Abstracts with Programs, Vol. 35, No. 6, September 2003, p. 21

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