GS 1 · 2016Physical Geography12 Marks
Q7.“The Himalayas are highly prone to landslides.”Discuss the causes and suggest suitable measures of mitigation.
Directive: Discuss12 marks
Introduction
The Himalayas, as young, tectonically active fold mountains, exhibit fragile geology, steep slopes, and high seismicity, rendering them highly prone to landslides.
Causes of Landslides
Natural Factors
- Heavy rainfall, cloudbursts, and glacial lake outburst floods (GLOFs) saturate slopes.
- River erosion, especially toe cutting, destabilizes mountain bases.
Anthropogenic Factors
- Unscientific road construction, tunneling, and quarrying disrupt slope stability.
- Deforestation, unplanned urbanization, and hydropower projects remove natural anchors and increase geological stress.
Measures for Mitigation
Structural/Engineering
- Constructing retaining walls, gabion walls, and wire mesh for slope stabilization.
- Implementing proper drainage systems and bio-engineering techniques.
Non-structural/Policy
- Developing early warning systems and strict land-use planning.
- Promoting afforestation, public awareness, and stringent building codes.
Conclusion
An integrated, multi-stakeholder approach, combining scientific research, policy implementation, and community participation, is crucial for sustainable development and effective landslide risk reduction in the Himalayas.
128 words · target ~150