Which risk increases when vegetation cover decreases on alluvial fans?

💡 Explanation

Less vegetation increases the risk of debris flows because reduced root cohesion weakens the sediment, and thus saturation leads to sudden, rapid mass movements; therefore debris flows are prominent, rather than gradual geomorphic changes or soil processes.

• Which outcome occurs when cyclical changes alter loess compaction?
• Which erosion dominates when seasonal wave energy intensifies at coastal headlands?
• Which erosion event results from high pore liquid pressure in sediments on steep volcanic slopes?
• Which risk increases when extensive loess deposits accumulate?
• Which outcome reduces agricultural productivity when irrigation raises water tables?
• Which airflow outcome dominates when a persistent high-pressure system obstructs atmospheric river streams?