River Delta

A river delta is a low-lying landform created when a river deposits sediment at its mouth. Named after the Greek letter delta (triangle shape), deltas have fertile soil and abundant water, making them historical centers of agriculture and population.

The world's largest delta is the Ganges-Brahmaputra Delta (Bangladesh and India), a vast low-lying area with a large population. Other major deltas include the Mekong (Vietnam), Nile (Egypt), Mississippi (USA), and Yangtze (China).

World's largest delta means Bangladesh. Nile Delta means Egypt. Deltas are vulnerable to flooding and sea-level rise, and Bangladesh is often cited as a country exposed to those risks.