Initial insights from 2.5D hydraulic modeling of floods in Athabasca Valles, Mars

被引:18
|
作者
Keszthelyi, L. P.
Denlinger, R. P.
O'Connell, D. R. H.
Burr, D. M.
机构
[1] US Geol Survey, Cascades Volcanic Observ, Vancouver, WA 98683 USA
[2] US Geol Survey, Flagstaff Field Ctr, Flagstaff, AZ 86001 USA
[3] William Lettis & Assoc, Golden, CO 80401 USA
[4] Carl Sagan Ctr Study Life Univ, SETI Inst, Mountain View, CA 94043 USA
关键词
D O I
10.1029/2007GL031776
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
We present the first application of a 2.5D hydraulic model to catastrophic floods on Mars. This model simulates flow over complex topography and incorporates flood dynamics that could not be modeled in the earlier 1D models. We apply this model to Athabasca Valles, the youngest outflow channel on Mars, investigating previous bank- full discharge estimates and utilizing the interpolated Mars Orbiter Laser Altimeter elevation map as input. We confirm that the bank- full assumption does not fit the observed landforms. Instead, the channel appears more deeply incised near the source. Flow modeling also identifies several areas of special interest, including a dry cataract that coincides with a region of predicted high erosion. However, artifacts in the elevation data strongly impacted estimated stages and velocities in other areas. More extensive connection between the flood hydraulics and observed landforms awaits improved topographic data.
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页数:5
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