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Multiple Choice
In the context of river systems, what is the term for a water erosion feature that forms when a meander is cut off from the main river channel?
A
Oxbow lake
B
Levee
C
Floodplain
D
Delta
Verified step by step guidance
1
Understand the context of the problem: The question is asking about a specific water erosion feature in river systems. This involves understanding how rivers shape the landscape through processes like erosion and deposition.
Review the term 'meander': A meander is a curve or bend in a river channel that forms due to the river's lateral erosion and deposition processes. Over time, meanders can become exaggerated and may eventually be cut off from the main river channel.
Learn about the feature formed when a meander is cut off: When a meander is cut off, it creates an isolated body of water. This feature is called an oxbow lake. It forms as the river takes a more direct path, leaving the meander loop disconnected.
Differentiate between the other terms: A levee is a natural or artificial embankment along a river that prevents flooding. A floodplain is the flat area around a river that is prone to flooding. A delta is a landform created at the mouth of a river where it deposits sediment as it flows into a larger body of water. None of these terms describe the feature formed by a cut-off meander.
Conclude that the correct term for the feature described in the problem is 'oxbow lake,' as it specifically refers to the water erosion feature formed when a meander is cut off from the main river channel.