❓ why
Why do some landslides happen after heavy rain?
Quick Answer
Heavy rain can soak into soil and rock, adding weight and reducing friction on slopes. Once the slope becomes unstable, it can suddenly fail and move downhill.
The Full Story
Water infiltration raises pore pressure between soil grains, making it harder for the slope to hold together. This is especially dangerous on steep, fractured, or already weathered slopes. Earthquakes, road cuts, and deforestation can also destabilize terrain and make rainfall-triggered landslides more likely. Landslides are common in mountainous regions and can range from slow soil creep to rapid debris flows.
Key Facts
1.Rain can increase pore water pressure in slopes
2.Landslides can be triggered by storms or earthquakes
3.Steep, fractured terrain is especially vulnerable
YouTube Angle
Suggested video title for this topic:
"When slopes get waterlogged, gravity wins fast."
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