Which outcome occurs when a lake's outflow threshold breaches?

💡 Explanation

A sudden lake breach initiates catastrophic outburst flooding, because the downcutting of the outflow channel results in drastic erosion by the **positive feedback mechanism**, causing the lake to drain and transport massive sediment downstream. Therefore, abrupt drainage occurs, rather than gradual delta formation or reversed gradients.

• Which outcome occurs when seasonal subtropical high-pressure systems weaken?
• Which risk increases when anticyclonic ocean gyre circulation weakens?
• Which outcome occurs when rapid tectonic uplift increases erosion rates in an arid mountain range forming an alluvial fan?
• Which outcome is primarily caused by mantle upwelling when a subducting plate stalls?
• Which risk increases where fractured limestone bedrock underlies agricultural land and nitrogen-based fertilizer is heavily applied?
• Which floodplain change results when sediment deposition exceeds erosion?