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ভূগোলGS3
GS3

Bhutan glacial lake outburst triggers flash floods in Bengal

Source:The Hindu ↗

কেন এটি গুরুত্বপূর্ণ

Glacial Lake Outburst Floods (GLOFs) represent major climate-induced disasters in the fragile Himalayan ecosystem. Transboundary incidents like this emphasize the necessity for proactive regional cooperation, real-time early warning mechanisms, and comprehensive disaster response frameworks for downstream populations in India.

সারসংক্ষেপ

A glacial lake outburst from the Shintaphu region in Bhutan caused flash floods, prompting the evacuation of over 4,000 people in West Bengal. The incident underscores the severe and escalating risks of Glacial Lake Outburst Floods (GLOFs) in the Himalayas and the imperative for robust cross-border early warning systems and disaster management frameworks.

মূল বিষয়

  • A glacial lake outburst from the Shintaphu area in Bhutan triggered severe flash flood alerts, leading to the evacuation of over 4,000 people to safety in West Bengal.
  • The outburst affected areas including the Gasa Tshachu hot springs in Bhutan, highlighting regional vulnerabilities to climate change in the Himalayas.
  • Transboundary disaster management and early warning coordination between India and neighboring Himalayan nations are critical to mitigating loss of life from GLOFs.

গুরুত্বপূর্ণ শব্দ

Glacial Lake Outburst Floods (GLOFs)

A sudden and catastrophic release of vast volumes of water from a glacial lake due to the breaching of its natural moraine or ice dam, often triggered by avalanches, earthquakes, or rapid melting.

UPSC context

GS Paper 3 (Disaster Management and Climate Change): Tests understanding of high-mountain hazards, vulnerabilities in the Himalayas, and risk mitigation strategies.

Source
Cross-border early warning systems

Coordinated bilateral or regional mechanisms designed to monitor upstream meteorological and hydrological hazards and instantly relay downstream flood alerts across international borders to safeguard vulnerable populations.

UPSC context

GS Paper 3 (Disaster Management): Evaluates international cooperation, transboundary disaster risk reduction, and proactive infrastructure resilience in South Asia.

Source

সংযুক্ত স্থির ধারণা

Geography & Disaster Management

What are Glacial Lake Outburst Floods (GLOFs) and how do they occur in the Himalayas?

  • Definition: Sudden release of massive volumes of water from glacial lakes, caused by the failure of natural moraine or ice dams due to earthquakes, landslides, or melting.
  • Causes: Accelerated glacial retreat driven by climate change creates unstable moraine dams holding rapidly expanding high-altitude lakes.
  • Mitigation: NDMA guidelines mandate hazard mapping, structural mitigation like siphon systems to lower lake levels, and real-time early warning sensors downstream.

আন্তঃবিষয় প্যাটার্ন

  • Transboundary Water Sharing + Himalayan Disaster Risk

    GLOF events in transboundary river basins highlight the inadequacy of bilateral hydrological data-sharing, echoing basin-sharing disputes under international water law principles like the Helsinki Rules.

  • Himalayan Climate Change + Border Infrastructure Security

    Rapid glacial retreat in the HKH region compounds strategic security vulnerabilities along sensitive Himalayan borders, merging environmental monitoring with border infrastructure planning.

GLOF causes, NDMA guidelines, and transboundary early warning systems will feature in prelims statements or mains GS-3 disaster management.

সংযুক্ত PYQ · 1

সংযুক্ত PYQ · 1

  • 2024MainsGS3

    Flooding in urban areas is an emerging climate-induced disaster. Discuss the causes of this disaster. Mention the features of two such major floods in the last two decades in India. Describe the policies and frameworks in India that aim at tackling such floods.