Which risk increases substantially when heavy tephra falls on a catchment area feeding a hydroelectric dam?

💡 Explanation

Increased sediment load is the risk factor; tephra vastly accelerates abrasion because increased suspended solids cause aggressive scouring of turbine blades' surfaces. Therefore, abrasion accelerates rather than temperature instability which is related to stratification or other failure modes.

• Which outcome occurs when deflation lowers the barrier island elevation?
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• Which change arises if arid region soils experience increased rainfall?
• Which phenomenon causes poleward heat redistribution from the tropics through atmospheric cells?
• Which process increases surface salinity where descending limbs of Hadley cells dominate?