Braided river

A braided river is a network of small channels separated by islands that are often not fixed. In other words, the river channels wander across a flat area.
Braided rivers are found in places where the river carries a lot of sediment, and when it slows down and spreads out. The river delta of the Amazon River is a good example on a huge scale, and the Waimakariri River is a good example on a smaller scale.
Large systems.
Large braided river systems are found around the world:
All these regions contain young mountains that erode quickly.
Europe has two notably braided rivers: the Narew, in Poland and Belarus, and the Tagliamento in northeastern Italy.