Which risk increases when lahars encounter drainage constrictions?

💡 Explanation

Increased hydraulic dam breaching occurs because constriction causes increasing lahar depth which greatly raises hydrostatic forces; a dam forming upstream fails; therefore catastrophic outburst floods occur downstream; rather than merely a contained sediment deposition.

• Which outcome occurs when the Coriolis effect interacts with subtropical high-pressure systems?
• Which consequence results when thermokarst destabilizes Arctic infrastructure?
• Which risk increases when glacial meltwater disrupts North Atlantic circulation?
• Which outcome increases when meltwater volume rises within a cirque?
• Which consequence results when pyroclastic flows rapidly melt glaciers?
• Which outcome dominates when sand supply decreases substantially in dune fields?