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 long-term isostatic process elevates previously submerged fjord landscapes?
• Near river deltas, which floodplain change results from excessive sediment deposition within a meander bend?
• Which outcome occurs when wave refraction concentrates energy on coastal stacks?
• Which condition reduces stability along over-steepened cirque walls?
• Which outcome occurs when substantial fluvial sediment deposition continually buries older soils?
• Which geological process accelerates when thermokarst lakes form in arctic permafrost regions?