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 largest delta is the Ganges-Brahmaputra Delta (Bangladesh and India), covering about 100,000 km2 with approximately 150 million residents. Other major deltas include the Mekong (Vietnam), Nile (Egypt), Mississippi (USA), and Yangtze (China).

In GeoHint, world largest delta means Bangladesh. Nile Delta means Egypt. Deltas are vulnerable to flooding and sea-level rise, making Bangladesh one of the most climate-affected countries.