APSC Answer Writing (Daily) based on Assam Tribune – 05/09/2026

Model answer

According to the ICIMOD 2026 Assessment, glacier ice-loss rates in the Hindu Kush Himalayas have doubled since 2000, severely amplifying the risk of Glacial Lake Outburst Floods (GLOFs) for nearly 2 billion downstream dependents.

Mechanism of GLOF: A Cascading Hazard

• Flowchart: [Global Warming] ➔ [Glacier Retreat] ➔ [Proglacial Lake Expansion] ➔ [Trigger: Avalanche/Rainfall] ➔ [Moraine Dam Breach] ➔ [Downstream GLOF Debris Flow].

Compounding Threats of GLOFs for the Brahmaputra Valley (Assam Focus)

• Hydrological Shock & Baseline Flooding: Sudden upstream GLOF discharge interacts with intense monsoon rainfall, acting as a massive risk multiplier for Assam’s already severe seasonal Brahmaputra floods.
• Geomorphic Alteration & Erosion: GLOFs transport massive sediment loads (boulders, silt) that cause sudden riverbed aggradation, exacerbating aggressive riverbank erosion in vulnerable zones like Majuli and Dhemaji.
• Infrastructure Vulnerability: Massive debris flows threaten critical transboundary and downstream infrastructure, including the Subansiri Lower Hydroelectric Project, bridges (e.g., Bogibeel), and the NH-15 corridor.
• Socio-Economic Devastation: Flash sediment deposition destroys riparian agriculture (paddy fields) and disrupts riverine (char) community livelihoods, causing sudden displacement.

Critical Gaps in Current GLOF Governance

• The Warning-to-Action Gap: While ISRO maps vulnerable lakes, high-altitude hazard data rarely translates into actionable, last-mile evacuation protocols for local communities.
• Transboundary Data Asymmetry: Lack of seamless, real-time hydrological data sharing across HKH nations (India, China, Bhutan) delays downstream early warnings in Assam.
• Siloed Disaster Planning: Current NDMA/ASDMA frameworks often treat floods, landslides, and GLOFs as isolated events rather than interconnected, compound disasters.

Comprehensive Disaster Governance Framework (Way Forward)

• Technological Integration: Leverage ISRO’s advanced satellites (e.g., EOS-05) and AI/ML for continuous, real-time monitoring of glacial lake expansion and moraine stability.
• Basin-Scale Risk Governance: Adopt the ICIMOD Regional Cryosphere Strategy to establish transboundary hydro-diplomacy and unified cross-border early warning systems (EWS).
• Climate-Resilient Infrastructure: Mandate strict GLOF-risk micro-zonation and cumulative environmental impact assessments for all developmental projects in the Himalayan and Brahmaputra belts.
• Community-Led EWS: Develop decentralized, multi-lingual early warning dashboards and conduct regular evacuation mock drills for vulnerable char and riverine populations.

Upholding our Fundamental Duty to protect the natural environment under Article 51A(g), building institutional resilience through cooperative federalism, and prioritizing inclusive growth will transform Himalayan disaster governance into a model of human-centric and sustainable development.