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← GeographyWhich outcome results when subsidence occurs unevenly beneath a levee during a prolonged drought?
A)Increased vegetation stabilizing the levee
B)Differential settling and fracturing of levee✓
C)Higher levee permeability reducing flood risk
D)Uniform compaction increasing levee strength
💡 Explanation
When uneven subsidence occurs, differential stress concentration develops because the subsurface material compacts differently, leading to shear stresses exceeding material strength, forming cracks. Therefore, differential settling and fracturing of the levee results, rather than stabilization, permeability increase, or uniform compaction which would require consistent deformation.
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