Alluvial fans

are usually created as flowing water interacts with mountains, hills, or the steep walls of canyons. ... As a stream flows down a hill, it picks up sand and other particles—alluvium. The rushing water carries alluvium to a flat plain, where the stream leaves its channel to spread out.

What is the alluvial process?

An alluvial system is a landform produced when a stream or river, that is, some channelized flow (geologists call them all streams no matter what their scale) slows down and deposits sediment that was transported either as bedload or in suspension. ... As the river slows down, suspended materials begin to be deposited.

What is the difference between alluvial and alluvium?

As nouns the difference between alluvium and alluvial

is that alluvium is soil, clay, silt or gravel deposited by flowing water, as it slows, in a river bed, delta, estuary or flood plain while alluvial is a deposition of sediment over a long period of time by a river; an alluvial layer.