Piret Plink-Björklund, Chiara Cavallina, Sonia Campos Soto, Molly O'Halloran
River discharge variability seems a significant control on fluvial facies and architecture. Variable discharge rivers have been shown to experience formative Froude supercritical flow and support high sediment concentrations, promote formation of fluvial fans, and form volumetrically significant sedimentary records. Yet, our hydrological theory and models consider subcritical flow as the formative flow in rivers, and seemingly contradict the data. We invite contributions from modern and ancient rivers, flume experiments and mathematical modeling that explore the nature of variable discharge rivers, their sedimentary record, and the formative role of supercritical flow to further explore the significance of discharge variability in landscape evolution and the formation of the sedimentary record.