Meanders: The Sinuous Curves of Rivers

Formation and Significance

Meanders are sinuous bends in a river's course, created by lateral erosion on the outer bank (cut bank) and deposition on the inner bank (point bar).

Key Controls

• Flow velocity: Faster flow increases erosion and sediment transport.
• Sediment load: More sediment enhances point‑bar growth.
• Obstacles: Rocks, vegetation deflect flow, initiating bends.

Environmental Effects

• Create wetlands and diverse habitats.
• Slow flow, reducing downstream erosion.
• Form scenic landscapes valued for recreation.

Classic examples: Amazon, Mississippi, Nile. Meanders migrate over time, shaping floodplains.