⚙️ how
How do river meanders migrate across floodplains?
GeologyRivers
Quick Answer
Fast water erodes the outside of a bend while slower water deposits sediment on the inside. This makes the bend move sideways and downstream over time.
The Full Story
In a meandering river, water flows faster along the outer bank of each curve, where erosion cuts into the bank. On the inside of the bend, slower water drops sand and silt, building a point bar. Repeated erosion and deposition shift the bend across the floodplain and can eventually create cut-off oxbow lakes. Meanders are a major way rivers reshape lowland landscapes.
Key Facts
1.Outer bends erode; inner bends gain sediment
2.Meanders can form oxbow lakes when cut off
3.Process is common on floodplains
YouTube Angle
Suggested video title for this topic:
"How does a river slowly redraw its own path?"