Extremely heavy rains in the northeast could accentuate existing flood conditions and lead to landslides in some areas of the north-eastern states and sub-Himalayan West Bengal, India Meteorological Department said on Saturday.
Which part of India is prone to landslides?
What Are the Landslide Prone States in India?
|Landslide Prone Areas||States & Cities|
|Eastern & North-Eastern Himalaya||West Bengal, Arunachal Pradesh, Sikkim|
|Naga-Arakan Mountain belts||Tripura, Nagaland, Mizoram, Manipur|
|Western Ghat region & Nilgiri||Kerala, Karnataka, Tamil Nadu, Maharashtra, Goa|
What are the principal causes of landslide in eastern Himalayas?
The study identifies regional geology or rock type, structure of the bedrocks (like, orientation of the rock foliations and faults), excessive rainfall and human interference like, mining of stones and fines, and diversion of streams as main factors in triggering the landslides in the region.
Why are some areas more prone to landslides?
The most landslide-prone regions are typically mountainous, have coarse soil, or lack vegetation to anchor the soil in place. A deforested mountainside, for example, would pose a high risk for landslides. … The threshold is relatively low in high risk areas, which need less rain to trigger a slide than low risk areas.
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.
Are landslides common in India?
Over 12 percent of the Indian landmass is prone to landslides. In just eight months of 2021, India has seen at least 61 landslides. Many of these like the one in Kinnaur in Himachal Pradesh, earlier this month, also saw a significant death toll, with 13 people losing their lives.
What is the reasons of landslide discuss the geographical region of India prone to landslide and why?
In India, increases in pre-monsoon (April and May) rain and monsoon rainfall could lead to an increase in landslides in the Himalayas and Western Ghats. If there is increased pre-monsoon rain in April and May, it can cause soil moisture to build sooner and elongate the landslide-prone risk period.
Why are landslides common in the Himalayas?
The Himalayan landscape, say geologists, is especially susceptible to landslides. The mountain range was formed due to the collision of Indian and Eurasian plates. The northward movement of the Indian plate causes continuous stress on the rocks, rendering them friable, weak and prone to landslides and earthquakes.
Why do landslides occur frequently in Himalayas?
Landslides are frequent in Himalayas because:
Heavy snowfall in winter and melting in summer. This induces debris flow, which is carried in large quantity by numerous streams and rivers. Himalayas are made of sedimentary rocks which can easily be eroded. These aides landslides.
Why landslide occurs in Himalaya reason?
Landslides are very common in the Himalayas especially during monsoon season. Himalayan landslides can be attributed to the fact that Himalayas lies at the convergence zone of two lithospheric plates, i.e., Indian plate in the south and Eurasian plate in the north.
Where are landslides most common?
The primary regions of landslide occurrence and potential are the coastal and mountainous areas of California, Oregon, and Washington, the States comprising the intermountain west, and the mountainous and hilly regions of the Eastern United States. Alaska and Hawaii also experience all types of landslides.
What is a landslide prone area?
Areas that are generally prone to landslide hazards
On or at the base of slopes. In or at the base of minor drainage hollows. At the base or top of an old fill slope. At the base or top of a steep cut slope.
Which regions are high risk landslide?
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.
What is the main cause of landslides?
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.
Where did landslide occur recently?
At least 136 people died in landslides in the western state of Maharashtra recently after heavy rains flooded hundreds of villages and swept away homes. Scientists have linked the rising number of landslides and their increased frequency to the retreat of glaciers that are melting due to rising temperatures.
Why Himalayas are prone to landslides Upsc?
The Himalayan landscape is susceptible to landslides and earthquakes. Formed due to the collision of Indian and Eurasian plates, the northward movement of the former puts continuous stress on the rocks, rendering them weak and prone to landslides and earthquakes.