Which morphological outcome characterizes alluvial fans experiencing episodic debris flows?

💡 Explanation

Stepped lobes emerge because debris flows deposit material in pulses related to fluctuating sediment and water supply; therefore, terraces form progressively at the fan surface through cycles of erosion during periods of lower discharge, rather than uniform deposition or channel incision.

• Which outcome occurs when the hydraulic gradient rises significantly within a coastal aquifer?
• Near coastlines underlain by limestone, which risk to underground freshwater aquifers increases due to storm surges?
• Which hazard dramatically increases when stratospheric tephra accumulates?
• Which outcome occurs when irrigation in arid climates mobilizes soluble salts?
• Which process initiates when accumulated snow within a cirque experiences repeated freeze-thaw cycles?
• Which outcome commonly occurs when rapid groundwater extraction lowers water tables near limestone caves?