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← HistoryWhich outcome occurs when a qanat water tunnel collapses?
A)Water table level decreases locally✓
B)Increased soil salinity downslope
C)Lower temperature water discharge
D)Elevated concentrations dissolved minerals
💡 Explanation
When a qanat tunnel collapses, the water flows are blocked, triggering decreased water capacity via hydrostatic pressure drop because the aquifer is no longer replenished. Therefore the local water table declines, rather than exhibiting increased pressures causing salinity.
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