2-4-2014 1 Research group River and delta morphodynamics Alluvial Fans Tjalling de Haas ([email protected]) How did this boulder get here? Today General intro on alluvial fans Processes that act on alluvial fans BIG QUESTIONS: Which three (genetic) types of alluvial fans exist? What is the difference between fluvial and debris flow? What determines whether a fluvial or debris flow occurs? Fan- or cone-shaped deposit of sediment Develops at catchment-valley transition What is an alluvial fan? Catchment Apex ADL IDL Primary processes Rock-gravity processes Sediment without fluid transported by gravity force Sediment-gravity processes Sediment and fluid transported by gravity force Fluid-gravity processes Sediment moved by the force of water
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