Which outcome increases due to decreasing stream competence in alluvial fans?

💡 Explanation

Decreasing stream competence reduces transport capacity, thereby causing increased sediment deposition; this is caused by sediment supply overwhelming stream prowess because coarser sediments drop out more rapidly, therefore favoring intense deposition, rather than incision.

• Which mechanism causes increased slumping when stacks collapse?
• Which risk significantly increases downwind subsequent to sustained tephra deposition?
• Which feedback occurs as formerly vegetated surfaces are converted to loess?
• Which mechanism increases sinkhole formation over limestone aquifers?
• Which mechanism accelerates headwall erosion within a glacial cirque containing a bergschrund?
• Over-extraction from urban aquifers in karst increases which risk?