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← Earth & Natural SystemsA confined aquifer beneath farmland receives excess irrigation water. Which outcome is most likely at a nearby spring, assuming constant hydraulic conductivity?
A)Reduced spring water temperature
B)Increased spring discharge rate✓
C)Decreased spring mineral concentration
D)Altered spring water isotopic composition
💡 Explanation
Increased irrigation causes greater hydrostatic pressure within the aquifer. This increased pressure gradient drives a higher rate of groundwater flow toward the spring because discharge rate is directly proportional to the pressure gradient. Therefore, the spring discharge rate increases, rather than temperature decreasing or mineral concentration changing significantly.
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