Which risk increases when pyroclastic flows deposit substantial tephra?

💡 Explanation

Deposited tephra increases lahar formation risk because abundant unconsolidated material saturates rapidly during rainfall, triggering debris flows. Therefore, lahars intensify, rather than acidification which requires specific gas compositions, not just tephra.

• On stratovolcano slopes, which outcome increases with lahar water saturation?
• Which risk increases when concentrated agricultural runoff occurs above karst topography?
• Which topographical outcome occurs when a meandering river exceeds base level?
• Which risk rises significantly when valley-confined lava flows develop levees?
• Which geological pattern arises because dissolution impacts vadose zone?
• Which risk increases where intense tropical weathering causes increased laterization?