Effects of basal topography and ice-sheet surface slope in a subglacial glaciofluvial deposition model

Abstract We use a mathematical model to investigate the effect of basal topography and ice surface slope on transport deposition sediment within water-filled subglacial channel. In our model, three zones different behaviour occur. zone furthest upstream, variations in lead under wide range conditions. this first zone, even very small gradually varying undulations (~5 m amplitude) can modelled Deposition is concentrated downstream gradient ridges, upstream troughs. The thickness steepness sheet has substantial impact rates, with shallow profiles strongly promoting both magnitude extent deposition. second all transported downstream. Finally, third close margin characterised by high rates existence these implications for esker formation dynamics environment.