Here's why:
* Sediment Deposition: As a river flows into a larger body of water (like an ocean, lake, or another river), its velocity decreases significantly. This decrease in velocity causes the river to lose its carrying capacity, leading to the deposition of sediments it has been transporting.
* Fan-Shaped Form: The sediments accumulate at the river's mouth, creating a fan-shaped landform. This fan-shaped form is characteristic of deltas.
* Distinctive Features: Deltas often have distributaries (smaller channels branching out from the main river), levees (natural ridges built up by the river's overflow), and wetlands.
Examples:
* The Mississippi River Delta
* The Nile River Delta
* The Ganges River Delta
