What Is Avulsion

What is avulsion?

A) A flooding stream permanently leaves its old channel to form a new floodplain channel.
B) A stream tends to avoid moving in a straight line: it tends to meander.
C) Streams often drop most of their sediment load quickly as the water velocity drops after a flood peak.
D) Streams tend to maintain a nearly constant meander radius for a given discharge.
E) Streams tend to be locked into their meandering channels, avoiding changing channels during a flood.