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← GeographyWhich consequence results when subsidence destabilizes an alluvial aquifer?
A)Increased seismic wave amplification occurs
B)Saltwater intrusion contaminates freshwater reserves✓
C)Vegetation succession accelerates rapidly onward
D)Permafrost thaw releases trapped methane
💡 Explanation
Saltwater intrusion becomes amplified because aquifer compaction from subsidence lowers freshwater head, allowing denser saltwater to encroach; therefore, saltwater intrusion occurs, rather than other hydrological events affected by different mechanisms.
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