---
title: "Mitigation of geological problems in Himalaya"
subject: "Engineering Geology II"
chapter: 2
key: "semester_4/engineering_geology_ii:himalaya-problems-mitigation"
source: https://www.bctengineer.com/q/semester_4/engineering_geology_ii/himalaya-problems-mitigation
site: BCT Engineering
---

# Mitigation of geological problems in Himalaya

Engineering Geology II · Chapter 2: Engineering Geology in Himalayas

- Asked in: 2072 Asoj, 3 marks
- Video: [Landslides/ Mitigation measures](https://www.youtube.com/watch?v=MRtjG_1zZ4k) — M Nawaz
- Answer checked by Claude Opus 5.5 (high effort) on 2026-10-14
- Page: https://www.bctengineer.com/q/semester_4/engineering_geology_ii/himalaya-problems-mitigation
- Whole chapter: https://www.bctengineer.com/md/semester_4/engineering_geology_ii/chapter-2

## Question

Describe the mitigation measures of geological problems in the Himalaya.

## Short answer

Mitigation includes geological investigation and hazard zoning, slope stabilization (retaining walls, rock bolts), drainage control, bio-engineering, river training and GLOF monitoring, earthquake-resistant design, tunnel support, early warning, land-use planning, and afforestation.

## Answer

Geological problems of the Himalaya arise from its young tectonics, weak and fractured rocks, steep slopes and monsoon rains. Mitigation measures are:

1. **Detailed geological investigation** before construction: mapping, geophysical surveys, boreholes and hazard zoning, avoiding active faults, unstable slopes and landslide-prone ground.
2. **Slope stabilisation:** reduce slope angle, benching, remove loose material, retaining and breast walls, gabions, rock bolts, anchors, wire mesh and shotcrete.
3. **Drainage control:** surface drains, catch drains, sub-surface drains and horizontal drains to lower pore pressure.
4. **Bio-engineering:** vegetation, grass and tree plantation to bind soil and reduce erosion.
5. **River and flood control:** embankments, spurs, check dams, river training, and monitoring of glacial lakes (lowering lake level, early warning systems).
6. **Earthquake resistant design** following the Nepal Building Code and keeping structures away from active faults.
7. **Tunnel support:** systematic classification and flexible support in squeezing and weak zones.
8. **Monitoring and early warning**, land-use planning and community awareness.
9. **Afforestation** and control of unplanned road cutting.

## Check yourself

The answer's key points as multiple-choice questions, with the correct option and why.

1. What should be done before construction in the Himalaya?
   A. Start excavation immediately
   B. Detailed geological investigation and hazard zoning, avoiding active faults and unstable ground
   C. Cut slopes steeply
   D. Remove drainage
   Answer: B. Mapping, geophysics, boreholes and hazard zoning help avoid hazards. (Key point: Investigation first)

2. Why is drainage control used for slope stability?
   A. To lower pore pressure
   B. To raise water pressure
   C. To soften soil
   D. To increase run-off on slope
   Answer: A. Surface, catch, sub-surface and horizontal drains lower pore water pressure. (Key point: Drainage)

3. What does bio-engineering achieve?
   A. Vegetation binds soil and reduces erosion
   B. It dissolves rock
   C. It increases slope angle
   D. It causes landslides
   Answer: A. Grass and tree plantation bind soil and reduce erosion. (Key point: Bio-engineering)

## Related in Engineering Geology II

- [Problems of Lesser Himalaya with mitigation](https://www.bctengineer.com/question.md?key=semester_4%2Fengineering_geology_ii%3Alesser-himalaya-problems) — Engineering Geology II, chapter 2, asked 5×
- [Problems of Lesser Himalaya and Terai](https://www.bctengineer.com/question.md?key=semester_4%2Fengineering_geology_ii%3Alesser-himalaya-terai-problems) — Engineering Geology II, chapter 2, asked 5×
- [Mitigation of geological hazards](https://www.bctengineer.com/question.md?key=semester_4%2Fengineering_geology_ii%3Ageohazard-mitigation-measures) — Engineering Geology II, chapter 5
- [Problems of Higher and Tethys Himalaya](https://www.bctengineer.com/question.md?key=semester_4%2Fengineering_geology_ii%3Ahigher-tethys-problems) — Engineering Geology II, chapter 2
- [Mitigation measures of erosion](https://www.bctengineer.com/question.md?key=semester_4%2Fengineering_geology_ii%3Aerosion-mitigation) — Engineering Geology II, chapter 5
- [Engineering geological problems of Siwalik zone](https://www.bctengineer.com/question.md?key=semester_4%2Fengineering_geology_ii%3Asiwalik-problems) — Engineering Geology II, chapter 2, asked 4×

## Related in other subjects

- [Engineering geological problems in tectonic divisions](https://www.bctengineer.com/question.md?key=semester_3%2Fengineering_geology_i%3Aengineering-geological-problems-in-tectonic) — Engineering Geology I, chapter 7, asked 2×
- [Discontinuities and engineering problems in Nepal Himalaya](https://www.bctengineer.com/question.md?key=semester_3%2Fengineering_geology_i%3Adiscontinuities-and-engineering-problems-in) — Engineering Geology I, chapter 7