Which outcome accelerates gully formation on alluvial fans?

💡 Explanation

Localized base-level fall encourages headward erosion via channel incision. This is because knickpoint migration increases flow velocity down-cutting channel, therefore intensifies gullying; rather than deposition or vegetation effects.

• Which phenomenon causes thermocline deepening in the eastern Pacific Ocean during El Niño events?
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• Which vent-related outcome increases greatly because expanding lava pressure exceeds rock strength?
• Which factor limits stalactite formation rate the most?
• Which outcome decreases the effectiveness of sediment bypassing systems installed alongside coastal barrier islands?
• Which outcome is prevalent when stratovolcanoes experience pyroclastic density currents?