MARTIN BOND / SCIENCE PHOTO LIBRARY MARTIN BOND / SCIENCE PHOTO LIBRARY
Severn river. Large bends or meanders in the course of the River Severn. A meander is caused when there is a slight bend in the river. The water flowing around the outside of the bend flows faster than the water going around the inside. The faster water tends to erode the river bank more quickly whilst the slower water will deposit sediment that it is carrying. The meanders increase in size until there are only narrow necks of land between them as seen here. Eventually the river cuts through the neck and the meander is left isolated from the river's flow; it is then known as an 'ox-bow lake'. Photographed near Iron Bridge in Shropshire, Britain.
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