Fluvial Discharge Rates of Martian Gullies: Slope Measurements from Stereo Hirise Images and Numerical Modeling of Sediment Transport
نویسنده
چکیده
Introduction: A stereo pair of HiRISE images of a pole-facing crater slope at 38S, 218E shows many fresh looking gullies. After measuring slopes using the stereo viewing geometry, we estimate the expected fluvial discharge rates using theory from Kleinhans [1] and Ikeda [2]. We also develop a numerical model of sediment transport based on theory presented in Kleinhans [1] to determine the time required to incise to the observed alcove depth. Combining the discharge estimates with the duration we estimate a total water volume needed to form these gullies. Finally, groundwater discharge has been a suggested mechanism for forming gullies on Mars [3-4]. We test whether groundwater discharge can deliver the water required by our model results.
منابع مشابه
Numerical modeling of Martian gully sediment transport: Testing the fluvial hypothesis
[1] Using a stereo pair of HiRISE images of a pole‐facing crater slope at 38°S, 218°E, we measure topographic profiles along nine gullies. Typical slopes of the interior channel region (above the depositional apron) are ∼20°. We test the hypothesis that sediment transport on gully slopes occurs via fluvial transport processes by developing a numerical sediment transport model based on steep flu...
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