river deltas

River deltas are landforms where a river meets a body of water, such as an ocean or a sea. As the river flows, it carries sediments—like bits of soil and small rocks—and deposits them when it slows down at the delta. Over time, these sediments build up, creating a flat, fertile area often characterized by a network of channels, marshes, and islands. Deltas are important for ecosystems and human activity, providing rich soil for agriculture and supporting diverse wildlife. They form in regions where sediment supply exceeds erosion, shaping the landscape at the river’s mouth.