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Which risk increases for hydroelectric turbines operating in regions experiencing intensified seasonal thermal stratification of reservoirs?

A)Elevated cavitation erosion rates rise
B)Decreased generator winding insulation lifespan
C)Increased penstock structural fatigue cracking
D)Reduced downstream oxygen dissolution gradients

💡 Explanation

Cavitation risk increases because temperature stratification causes density gradients. This leads to variable localized pressures within the turbine. Therefore, the likelihood of cavitation rises during operation rather than the degradation of electrical or structural components because the localized temperature changes cause pressure fluctuations.

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