Which outcome typically occurs when ephemeral stream systems encounter an abrupt decrease in gradient?

💡 Explanation

Alluvial fans are common results of sudden gradient decreases because deposition occurs due to decreased water flow competence. Therefore, sediments accumulate, rather than forming terraces or incised meanders which require sustained flow over time.

• Which landform develops due to sustained aeolian sediment transport?
• Which consequence commonly results when heavy rainfall overwhelms alluvial plain drainage?
• Which pedogenic outcome occurs when intense rainfall impacts bauxite deposits?
• Which outcome occurs when katabatic winds encounter vegetation?
• Which risk increases when carbonic acid saturates a cave?
• Which outcome is amplified when artificial levees narrow rivers?