Why Rivers Slow Down Near Their Mouths
Understanding River Velocity: The Mystery of the Slowing Current
Discover the fascinating science behind why rivers slow down as they approach their mouths.

River Mouths
As a river nears its end, its velocity noticeably decreases. This isn't a random occurrence, but rather a result of several interacting factors. This page explores those factors, offering a clear and concise explanation of this natural phenomenon.
Reduced Gradient
The flatter terrain near the mouth reduces the slope, lessening the gravitational pull on the water and slowing the flow.
Increased Cross-Sectional Area
Widening and deepening of the river channel near the mouth increases the area the water flows through, leading to a slower current.
Tidal Influence
In coastal rivers, tides significantly impact flow; high tide slows the current, while low tide can slightly increase it.