What Is River Velocity?

Definition and Measurement

River velocity (or stream velocity) is the speed at which water flows in a river, typically measured in meters per second (m/s) or kilometers per hour (km/h).

Key Influencing Factors

• Slope: Steeper gradients increase velocity due to gravity.
• Discharge: More water volume increases flow speed.
• Obstacles: Rocks, vegetation, and channel roughness create drag, slowing flow.

Importance

Velocity affects sediment transport, dissolved oxygen levels, aquatic habitats, and hydroelectric power potential.