Landslides

Sometimes persons do not place themselves in such locations. However some do, others that don't , usually are affected as a result of some tectonic activity or eventual slope instability that results in landslides . Eg earthquakes prone or slopes affected by deforestation.

Heavy rainfall saturates the soil, making it more prone to movement. This causes the soil to become unstable and eventually gives way, leading to a landslide. The additional weight of the water can also trigger slope failure.

The Aberfan landslide (also known as the Aberfan disaster) occurred in the village of Aberfan, in Wales on Friday 21 October 1966.

A spoil heap from the Merthyr Vale Colliery which was deposited on the side of Mynydd Merthyr above the village primary school collapsed leading to the formation of a debris flow which ran at very high speed down the hill side destroying a number of houses and ultimately burying the school in over 30 feet (10 metres) of thick mud and rubble. This resulted in the deaths of 116 children and 28 adults.

It was caused by the tipping of spoil onto a site on the hill side where water out flowed in a series of springs. There had been a period of heavy rainfall in the days before the landslide which had caused water to build up within the colliery debris pile. This acted to increase the pore water pressure within the material (this acts to force soil or rock particles apart, causing a decrease in the effective stress of the material essentially making it weaker) and ultimately resulted in a circular slip failure occurring in the slope. This acted to drive up the pore pressure even further causing the fine grained material in the debris pile to effectively liquefy and it was this material that flowed at high speed down the slope carrying larger debris with it that caused the destruction in the village.

The inquiry into the disaster ultimately found that the cause was due to the lack of control over the tipping of debris and a lack of understanding of slope stability issues by the mining engineers running the colliery who concentrated on the safety of the under ground excavations rather than the debris piles produced by mining. Previous instability in the spoil piles had been ignored.

As a result of the disaster and the ensuing enquiry, new legislation was created to remedy the absence of laws and regulations governing the safety and stability of mine and quarry waste tips.

The disaster also had a significant impact on the small community of Aberfan. Local doctors reported an increase in depression and alcohol related health problems after the disaster.

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The study of landslides is called "Landslide Geology" or "Landslide Science." It involves investigating the causes, mechanisms, and impacts of landslides on the environment and human activities. Scientists in this field work to understand and mitigate the risks associated with landslides.

Well, I myself am trying to find out why they are helpful, but landslides are harmful because they can cause injuries, death, buried houses, and people being handicapped and buried alive. Hope that helps! :)

Landslides involve the downward movement of rock, soil, and debris on a slope or cliff, while mudflows are fast-moving mixtures of water, rock, and debris that flow downhill. Landslides typically occur on steeper slopes, while mudflows can occur on gentler slopes and are more fluid-like in their movement. Mudflows are more likely to be triggered by heavy rainfall or rapid snowmelt, while landslides can be triggered by a variety of factors such as earthquakes or volcanic activity.

Landslide is a physical phenomenon (geological).

Gravity acts alone to produce avalanches and landslides. When the force of gravity exceeds the strength of the material holding it in place on a slope, the material will move downhill in the form of an avalanche or landslide.

After heavy rain, a landslide blocked the road and caused a traffic jam.

The most common type of landslide is a debris flow, which is a fast-moving landslide consisting of a mixture of soil, rock, and water. Debris flows occur when heavy rainfall or rapid snowmelt saturates the ground, causing loose material to flow downhill. They can happen in areas with steep slopes and inadequate drainage.

Landslides can significantly alter landforms by changing the shape, slope, and elevation of the affected area. They can lead to the creation of new landforms such as scarps, terraces, and debris cones. Landslides also contribute to the overall shaping of the landscape by redistributing sediments and altering drainage patterns.

The landslides in Tibet in 1950 were likely triggered by heavy rainfall and the region's steep terrain. The combination of water-saturated soil and steep slopes can lead to slope failures and landslides. Deforestation and land use practices may have also played a role in destabilizing the slopes.

Mass movements like landslides, mudslides, and debris flows are often triggered by the addition of water, which increases the weight and lubricates the slope materials, reducing their stability and causing them to move downslope. Similarly, coastal erosion and beach erosion can also be influenced by the presence of water, which weakens the coastal landmass and contributes to its movement.

The speed of landslides and mudflows can vary greatly depending on factors such as slope steepness, volume of material, and moisture content. They can range from a few centimeters per hour to over 160 km/h in extreme cases.

Landslides and soil creeps are examples of mass wasting, which is the downhill movement of rock and soil under the force of gravity. They occur when the strength of the material is exceeded by the force of gravity acting upon it, leading to downslope movement.

Landslides can be dangerous because they can happen suddenly and without warning, causing great damage to property and infrastructure as well as posing a risk to human lives. Landslides can happen in areas with steep slopes, heavy rainfall, or seismic activity, making them a natural hazard that can have devastating consequences.

Landslides caused by cutting trees affect the ecosystem by destroying habitat where many animals and even people live. The landslides actually change the contours of the land sometimes rerouting rivers.

To prepare for a mudslide, keep emergency supplies on hand, such as food, water, flashlights, and first aid kits. Make sure your home is well-insulated and waterproofed, and consider installing barriers to divert mud away from your property. Stay informed about local weather conditions and evacuation routes.

fjords are often formed like the coastline of Scandinavia after the last ice age. It can also make the earth on which it resides go flat, much like the Alberta and Saskatchewan in Canada, also the prairies of the USA. It all depends on the composition of the earth underneath the glacier. I hope this info is helpful and or 100% correct, for it has been some years since I last did research on this topic.

at lest 300000 landslids happen each year

Mercury does not have any landslides in the traditional sense as it lacks significant geological activity due to its small size and proximity to the Sun. However, surface features called "lobate scarps" are thought to be the result of compressional forces causing the planet's crust to shrink and wrinkle, which could be considered a type of tectonic activity.

areas affected by lanslide are kashmir, himachal pradesh, punjab, marasashtra, arunachal pradesh,narkanda The Indian states most affected by landslides are Arunachal Pradesh, Manipur, Meghalaya, Nagaland and Sikkim.

The largest landslide on record occurred on May 18, 1980 when the north face of Mount St Helens collapsed during an earthquake. It had an estimated volume of 3 cubic kilometers. The landslide relieved pressure on magma inside the volcano, triggering a massive eruption.

Democratic-Republican Thomas Jefferson overwhelmingly defeated Federalist Charles Pinckney in the Presidential election of 1804. Jefferson carried 15 states with 162 electoral votes compared Pinckney's 2 states and 14 electoral votes. The only states that Jefferson lost in were Delaware and Connecticut.