Delta is a landform created by sediment that is carried and deposited by a river. It forms where a river meets a larger body of water, such as a sea or ocean. The land often spreads out in a fan or triangle shape. Deltas can have many small channels and waterways.

Deltas are found in places like the Nile Delta in Africa and the Mekong Delta in Asia. They form over long periods as rivers deposit sand, soil, and other materials. Deltas often support rich ecosystems. Many people also live and farm in these areas.