A deltaic plain consists of active or abandoned deltas, which are either overlapping or contiguous to one another. A delta is a relatively flat area at the mouth of a river or a river system in which sediment load is deposited and distributed (see Vol. VI: Delta Sedimentation).

How is deltaic plain formed?

Deltas are wetlands that form as rivers empty their water and sediment into another body of water, such as an ocean, lake, or another river. Although very uncommon, deltas can also empty into land. A river moves more slowly as it nears its mouth, or end.

What are deltaic environments?

Classification of Deltas. A delta, in the geographic sense, is a deltoid-shaped area determined by the major bifurcations of a river and resulting from relatively rapid deposition of river-borne sediment into a more or less still standing body of water.