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← GeographyWhich risk increases for communities protected by artificial levees constructed on a meandering river?
A)Increased sediment deposition upstream
B)Accelerated channel avulsion events✓
C)Reduced groundwater recharge rates
D)Decreased biodiversity within floodplain
💡 Explanation
When levees confine a meandering river, channel incision increases because the flow is constrained and the river's energy is focused, which increasing the likelihood suddenly and dramatically changing course onto adjacent lower-lying lands. Therefore, increased channel avulsion is the result, rather than other options depending on separate hydrological changes.
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