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← GeographyWhich outcome occurs when deltaic levees fail structurally?
A)Saltwater intrusion into freshwater aquifers✓
B)Increased rates of glacial isostatic rebound
C)Decreased heat flow from Earth's mantle
D)Enhanced formation of transform faults
💡 Explanation
Levee failure in a delta allows saltwater intrusion because the *hydraulic gradient inversion* causes subsurface saltwater to migrate inland; therefore freshwater aquifers become contaminated, rather than glacial rebound, heat flow changes, or fault formation which have different mechanisms.
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