Now Reading: Study finds climate and geology interplay in Wayanad landslides
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Study finds climate and geology interplay in Wayanad landslides
The devastating Wayanad landslides of July 30, 2024, were not caused by extreme rainfall alone, a new study in the journal Landslides concludes. Researchers from the University of Kerala, IISER Mohali, and…
The Story in Brief
The devastating Wayanad landslides of July 30, 2024, were not caused by extreme rainfall alone, a new study in the journal Landslides concludes. Researchers from the University of Kerala, IISER Mohali, and Savitribai Phule Pune University say that while nearly 573 mm of rain in 48 hours triggered the disaster, pre-existing geological weaknesses such as shear zones and fractures determined where and how the slope failed.
The debris flow travelled 8 km and descended 768 metres, sweeping through Punchirimattam, Mundakkai and Chooralmala. Field investigations in April 2025, including drone-mounted LiDAR, revealed that ancient crystalline rocks had undergone chemical weathering, creating planes of weakness. Water infiltrating these fractures increased pressure, causing a large block to detach. Narrow valley sections with stronger rocks created temporary dams whose collapse unleashed destructive surges.
The Indian Opinion
This study cuts through the rush to blame either climate change alone or local mismanagement. The disaster was a compound event: extreme rain on a geologically primed slope. Too often, after such tragedies, public debate swings between fatalism and finger-pointing. The real lesson is that India's hills need detailed geological mapping, not just weather alerts. Will state and central agencies now fund such mapping before the next monsoon?
Source: thehindu.com
This story was synthesised by AI from the source linked above.
