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 process primarily causes the formation of oxbow lakes in low-gradient fluvial systems?
• Which biogeochemical effect typically follows enhanced coastal upwelling along continental margins?
• Which volcanic phenomenon results following ice sheet removal?
• Which mechanism regulates global temperatures via ocean currents?
• Which process drives increased surface productivity due to coastal upwelling?
• Which outcome decreases the effectiveness of sediment bypassing systems installed alongside coastal barrier islands?