Landslide dams river in rain-battered Arunachal, warning for Assam downstream
GS1History · Society · Geography· Physical geography (landforms, oceans, climate)· Prelims·
Why in news
A massive landslide in Arunachal Pradesh blocked the Siji river, creating an artificial lake and threatening downstream areas in Assam.
Background
The landslide occurred in the Lower Siang district of Arunachal Pradesh due to heavy rainfall. It caused significant damage to infrastructure in the neighboring Dhemaji district of Assam, affecting 15,483 people.
Facts for Prelims
- PlaceSiji River: A river in Arunachal Pradesh currently impacted by landslide-induced damming.
- BodyBorder Roads Organisation (BRO): An organization under the Ministry of Defence responsible for infrastructure in border areas.
- Fact15,483 people were reported to be impacted by the landslide-related damage in Dhemaji, Assam.
For Mains
Q. Discuss the geological vulnerabilities of the Himalayan region to landslides and suggest measures to mitigate the risk of flash floods in downstream plains.
Dimensions to cover in your answer
- Geological instability: High seismic activity and fragile lithology in the Eastern Himalayas increasing landslide frequency.
- Infrastructure vulnerability: Damage to critical connectivity in border districts hindering rapid disaster response and relief.
- Downstream risk: Hydro-geological threat of 'landslide dams' causing sudden flash floods in the Brahmaputra basin.
Keywords: Flash floods · Landslide dams · Geological vulnerability · Disaster mitigation · Infrastructure resilience
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