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← GeographyWhich outcome worsens when river levee compaction increases?
A)Downstream flood pulse synchronisation✓
B)Enhanced groundwater recharge rates
C)Decreased channel bed erosion
D)Increased floodplain sediment deposition
💡 Explanation
Increased levee compaction reduces the levees' capacity to absorb floodwaters thus increasing flow velocity due to reduced pathway length through the banks. This Synchronization of pulse events occurs because smaller attenuation occurs, therefore increasing flood peaks rather than buffering downstream peaks.
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