Stages of River Development - SS1 Geography Past Questions and Answers - page 2

The lower course of a river is typically wider and slower-flowing, and it often features levees formed by sediment deposition.

Deltas form as rivers meet the sea or a lake, slowing down and depositing sediment they've carried. This occurs because the river's flow velocity decreases, leading to sediment accumulation at the river's mouth.

Some types of deltas include arcuate, bird's foot, estuarine, and cuspate deltas. They differ in terms of their shape and the arrangement of distributary channels.

Deltas are important for agriculture because they have rich, fertile soil. The constant deposition of sediment from the river enriches the soil, making it ideal for crop cultivation.

Deltas can act as natural buffers against storm surges and coastal erosion. They help protect coastal communities from the impact of natural disasters like hurricanes and tsunamis.