Communication Dans Un Congrès Année : 2012

EXPERIMENTAL INVESTIGATION OF GULLY FORMATION UNDER LOW PRESSURE AND LOW TEMPERATURE CONDITIONS

Résumé

Introduction: A large morphological diversity of gullies is observed on Earth and on Mars. Debris flow – a non-newtonian flow comprising a sediment-water mix – is a common process attributed to gully formation on both planets [1, 2]. Many variables can influence the morphology of debris flows (grainsizes, discharge , slope, soil moisture, etc) and their respective influences are difficult to disentangle in the field. Furthermore effects specific to the martian environment have not yet been explored in detail. Some preliminary laboratory simulations have already been performed that isolate some of these variables. Cold room experiments [3] were already perfomed to test the effect of a melted surface layer on the formation of linear gullies over sand dunes. Low pressure experiments [4] were performed to test the effect of the atmospheric pressure on erosional capacity and runout distance of the flows. Our aim is to develop a new set of experiments both under Martian atmospheric pressure and terrestrial atmospheric pressure in order to reproduce the variability of the observed morphologies under well constrained experimental conditions.

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hal-01713618 , version 1 (20-02-2018)

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  • HAL Id : hal-01713618 , version 1

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Gwenaël Jouannic, Susan J. Conway, J. Gargani, F. Costard, M R Patel, et al.. EXPERIMENTAL INVESTIGATION OF GULLY FORMATION UNDER LOW PRESSURE AND LOW TEMPERATURE CONDITIONS. 43rd Lunar and Planetary Science Conference, Mar 2012, The Woodlands, United States. ⟨hal-01713618⟩
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