Fan Destabilization
Fan Destabilization : A hydrogeomorphic process in which one or more of the following occur beyond the naturally occurring range of variability: (a) an increase in the depth of a channel within an alluvial or colluvial fan; (b) a flow of water and sediment over the banks of a channel within an alluvial or colluvial fan, which spreads out across the surface of the fan; or (c) the creation of a new channel within an alluvial or colluvial fan