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dc.contributor.authorLuo, W.
dc.contributor.authorHoward, A.D.
dc.date.accessioned2013-01-17T21:55:40Z
dc.date.available2013-01-17T21:55:40Z
dc.date.issued2008
dc.identifier.citationLuo, W., and A. D. Howard, 2008, "Computer simulation of the role of groundwater seepage in forming Martian valley networks," Journal of Geophysical Research, v. 113, E05002en_US
dc.identifier.issn0148-0227
dc.identifier.urihttp://commons.lib.niu.edu/handle/10843/13358
dc.identifier.urihttp://hdl.handle.net/10843/13358
dc.description.abstractThe role of groundwater in forming Martian valley networks is simulated in a computer model as seepage erosion by contributing to surface runoff and as seepage weathering by causing accelerated weathering of bedrock, which makes its subsequent erosion and removal easier. Simulation results show that seepage erosion cannot mobilize large grain size sediment and is marginally effective at generating integrated valley networks with realistic rates of aquifer recharge. On the other hand, seepage weathering may play a major role in forming Martian valley networks. Seepage weathering combined with fluvial runoff creates stubby deep canyons with abrupt headwalls that are similar in morphology to terrestrial and Martian valley systems attributed to erosion by groundwater. Depending on the relative contribution of groundwater weathering to surface runoff erosion, a continuum of valley network morphology can be generated. Eolian modification masks the original differences in fluvial landforms, making different scenarios visually more similar. Martian valley networks may have developed through a range of combinations of runoff erosion and seepage weathering, which can complicate the interpretation of the processes based on final landform morphology. Unequivocal identification of seepage involvement of valley incision on Mars may not be possible without knowledge of subsurface properties (hydraulic conductivity, layering, degree of cementation, etc.) and the grain sizes of sediment transported through the valley systems.en_US
dc.language.isoen_USen_US
dc.publisherAmerican Geophysical Unionen_US
dc.subjectmartian valley networksen_US
dc.subjecterosionen_US
dc.subjectgroundwateren_US
dc.subjectMarsen_US
dc.subjectvalley network morphologyen_US
dc.subjectlandform morphologyen_US
dc.titleComputer simulation of the role of groundwater seepage in forming Martian valley networksen_US
dc.typeArticleen_US
dc.altlocation.urihttp://dx.doi.org/10.1029/2007JE002981en_US
dc.contributor.departmentDepartment of Geography


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