Abstract
Sediment transport drives channel erosion and shaping of rivers, so understanding sediment dynamics is a key factor in understanding landscape evolution. Rates of river bedrock erosion depend on the properties of sediment transport, including the grain size distribution of transported sediment and the speed at which sediment moves. However, scientists' knowledge of sediment transport in rivers over long time periods or long distances is limited because there are few methods of observing grain transport over long distances or time scales. Carretier and Regard show that the concentrations of cosmogenic radionuclides in pebbles vary during river transport.
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