Which risk increases as alluvial river base level falls?

💡 Explanation

Increased river terrace formation occurs because a falling base level causes increased downcutting via channel incision; therefore, the river erodes downward, creating terraces, rather than laterally meandering after avulsion or saturating floodplains.

• Which process limits vegetation establishment during primary pedogenesis?
• Which consequence results when pyroclastic surges encounter a saturated floodplain?
• Which outcome results when differing fault movement causes horizontal displacement?
• Which consequence results when tephra accumulation obstructs streams?
• Which process primarily initiates cirque formation in glaciated alpine regions with pre-existing weaknesses?
• Which risk increases when soil-forming processes exceed equilibrium?