Which process causes increased lahar hazard after tephra deposition?

💡 Explanation

Decreased surface water infiltration rates increase lahar risk; because tephra reduces permeability causing overland flow during precipitation, therefore easily generating mudflows, rather than water filtering harmlessly into the subsurface.

• Which phenomenon is amplified when deforestation reduces land surface evapotranspiration?
• Which outcome is intensified in transform plate boundaries due to asperities?
• Which risk increases during intense thawing events in permafrost regions with alluvial fans?
• Which biogeochemical effect occurs when coastal upwelling is suppressed due to stronger subtropical gyre stratification?
• Which mechanism strengthens subtropical high-pressure zones due to Hadley cell dynamics?
• Which risk increases when a coastal development alters surface runoff patterns near an oceanic gyre?