UPSC Mains 2021 · GS III · Q18 · 15 marks · 250 words

Describe the various causes and the effects of landslides. Mention the important components of the National Landslide Risk Management Strategy.

हिन्दी में

भू-स्खलन के विभिन्न कारणों और प्रभावों का वर्णन कीजिए । राष्ट्रीय भू-स्खलन जोखिम प्रबंधन रणनीति के महत्त्वपूर्ण घटकों का उल्लेख कीजिए ।

How a topper answered the closest question

Toppers wrote this one in a test series: “Explain the various causes and the effects of landslides. Also, discuss the measures to mitigate their impact, with a special emphasis on National Disaster Management Authority (NDMA) guidelines.”

Harshvardhan Ashok Tidke269 wordsTheir whole copy

Opening · a figure

According to Geological survey of India, '12-13% of Indian area is susceptible to landslide'.

These landslides are a very common & prevalent threat to Indian population.

Body · points

Landslide, causes & effects, why they occur

① Landslide ↳ slipping of rocks, soil etc from mountain with considerable slope, causing death & destruction downhill

Reasons for landslides

1] Himalayan landslides ⊙ tectonically active region (Alp-Himalayan line)

Diagram
- Map of India - Hashed/shaded region: Himalayas landslide prone areas - Western Ghats: marked - Nilgiris: marked and circled (susceptible for) - Eastern Ghats: marked

◎ Sedimentary rocks that are unconsolidated ◎ Hyper local weather events eg Kedarnath cloud burst ◎ Human Intervention (Unethical) → Tunneling in sensitive areas → Deforestation & grazing → Road & Dam construction (e.g Dham project) ◎ Rain-snow action ◎ High slope

12 (Western ghats & Eastern ghats)

◎ High slopes ◎ Development projects ◎ Deforestation & grazing ◎ Village growth along hazard line ◎ disturbance to local ecosystem ◎ Hyper local weather events (e.g Waynad landslide, Trishulwad, Malenad)

Impact of landslide/effects → Incomplete infrastructure projects & delays in completion → loss of (human life) & property

⊙ death destruction of local capital & livelihood opportunities, whole villages wiped out. ⊙ leads to poverty, disease & trauma & survivors ⊙ National security implications & Himalayan region

NDMA guidelines for landslide management

Close · a source

1] Vulnerability analysis & Hazard zone mapping 2] Disaster plans creation & relocation from hazard & risk prone zones 3] Avoiding deforestation & grazing in sensitive areas 4] EIA (necessity) & should be avoided 5] Measure & coordination for relief & rehabilitation 6] checking & pro-active removal of loose rocks in sensitive zones.

Gadgil committee & Kasturirangan committee reports need to be implemented to the 'T' for the (menace of) landslide to have reduced impact.

How toppers approach this question, and more on its topic: open the question.

Toppers’ answers to other close questions

Source: UPSC, Civil Services (Main) Examination 2021, General Studies Paper III, Q18. The paper on upsc.gov.in. Themes and links to toppers’ answers are by UPSC Grade, not by UPSC.