India has the highest mountain chain on earth, the Himalayas, which are formed due to collision of Indian and Eurasian plate, the northward movement of the Indian plate towards China causes continuous stress on the rocks rendering them friable, weak and prone to landslides and earthquakes.
What causes landslides in India?
Which human activities influence landslides in India? Landslides are induced by human activities such as deforestation, dynamite blasting of rocks, earth work, constructions, vibrations from big machines, etc. The activities that require cutting down of trees are mainly considered to induce landslide in prone areas.
Where does landslides mostly occur in India?
The major landslide prone areas in India include the Western Ghats and Konkan Hills (Tamil Nadu, Kerala, Karnataka, Goa and Maharashtra), Eastern Ghats (Araku region in Andhra Pradesh), North-East Himalayas (Darjeeling and Sikkim) and North West Himalayas (Uttarakhand, Himachal Pradesh, Jammu and Kashmir).
Are landslides common in India?
Disasters caused by landslides and flooding are common in India during the June-September monsoon season, when heavy rains weaken the foundations of structures that are often poorly built.
What is the reason for landslide?
Landslides are caused by disturbances in the natural stability of a slope. They can accompany heavy rains or follow droughts, earthquakes, or volcanic eruptions. Mudslides develop when water rapidly accumulates in the ground and results in a surge of water-saturated rock, earth, and debris.
How can we stop landslides in India?
NDMA has published Guidelines on Landslides and Snow Avalanches as given on its website.
- Keep drains clean,
- Direct storm water away from slopes,
- Inspect drains for – litter, leaves, plastic bags, rubble etc.
- Keep the weep holes open.
- Don’t let the water go waste or store above your house.
What are the four types of landslides?
Landslides are part of a more general erosion or surficial pro- cess known as mass wasting, which is simply the downslope movement of earth or surface materials due to gravity. They are classified into four main types: fall and toppling, slides (rotational and translational), flows and creep.
Where do landslides mostly occur?
Landslides occur in every state and U.S. territory.
The Appalachian Mountains, the Rocky Mountains and the Pacific Coastal Ranges and some parts of Alaska and Hawaii have severe landslide problems. Any area composed of very weak or fractured materials resting on a steep slope can and will likely experience landslides.
Which country has the most landslides?
Countries where there are frequent landslides include China, the western United States, Italy, Switzerland, Japan, the Philippines and Indonesia. Countries that straddle the Himalayas such as Nepal, Pakistan and India are also areas where there are a large number of landslides.
How can we prevent a landslide?
There are also various direct methods of preventing landslides; these include modifying slope geometry, using chemical agents to reinforce slope material, installing structures such as piles and retaining walls, grouting rock joints and fissures, diverting debris pathways, and rerouting surface and underwater drainage.
Which part of India is prone to landslides?
The two regions most vulnerable to landslides are the Himalayas and the Western Ghats. The Himalayas mountain belt comprise of tectonically unstable younger geological formations subjected to severe seismic activity.
What are effects of landslides?
The impact of a landslide can be extensive, including loss of life, destruction of infrastructure, damage to land and loss of natural resources. Landslide material can also block rivers and increase the risk of floods.
How often do Landslides occur in India?
In India, 420,000 sq km, or 12.6% of the total land, is landslide-prone.