Assumming that the same physical laws pertaining to the entrainment of sediment on Earth applies to Mars, the minimum paleoflow conditions of a specific martian outflow channel is characterized using empirical relationships, developed from terrestrial river systems whose slopes are similar to the martian channels, between median grain size (d(sub)50) and channel slope (S) and between d(sub)90 grain size (i.e., the grain size which is larger than 90% of the channel material) and flow shear stress (tau). This approach assumes that channel slope (a measurable parameter) can be used to infer a characteristic median grain size (d(sub)50, an unknown parameter) for the channel bed. Once grain size is known, the minimum flow dynamics required to entrain the grain can be determined. This technique is used to model the minimum flow conditions of the martian channel, Maja Vallis.
Lunar and Planetary Science Conference
- Pub Date:
- March 1996
- MAJA VALLIS;