Which risk increases when rapid deposition decreases permeability in alluvial fans?

💡 Explanation

Debris flows are favored because water accumulates instead of infiltrating; the low permeability causes saturation. This increases pore water pressure, therefore decreasing soil shear strength, rather than entraining unsaturated sediment.

• Which outcome occurs when extensive bioturbation acts upon volcanic ash?
• Which mechanism dictates seasonal stratification in a dimictic glacial lake at moderate latitude?
• Which mechanism MOST directly causes meandering stream formation on a gently sloping floodplain?
• Which outcome occurs when a substantial landslide obstructs stream flow into a glacial lake?
• Which outcome occurs when a newly formed volcanic island destabilizes?
• Which outcome is accelerated when the drip rate increases impacting cave stalactite formation?