⚙️ how
How does a river meander, and why do bends move over time?
Quick Answer
Meanders form because water flows faster on the outside of a bend and slower on the inside. That makes erosion widen the outer bank and deposition build the inner bank.
The Full Story
A meandering river develops sweeping bends as flowing water erodes the outer bank and deposits sediment on the inner bank. The faster current on the outside of a bend has more energy and can undercut the bank, while slower water inside the bend drops sand and silt. Over time, the bend migrates sideways and downstream. In some cases, the river eventually cuts through the narrow neck of a meander and leaves behind an oxbow lake.
Key Facts
1.Outer bank erodes faster
2.Inner bank builds up with sediment
3.Oxbow lakes can form from cut-off bends
YouTube Angle
Suggested video title for this topic:
"Why rivers wiggle instead of going straight"
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