Joshimath: What is landslide and why does it happen? Not only Joshimath, such incidents have also happened in America and Mexico – Joshimath: Land Subsidence Definition And Causes, Land Subsidence Is A Global Problem

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landslide problem

landslide problem
– Photo: Amar Ujala

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So far 678 houses have developed cracks in Joshimath, Uttarakhand. A total of 81 families have been shifted to safer places. On Monday, Chief Minister Pushkar Singh Dhami held a meeting with the officers and members of the National Disaster Management Authority (NDMA) at the Chief Minister’s residence. The NDMA members suggested that it is necessary to find out where the water is stagnant in the landslide area and what are the reasons for the landslide. In this news, we are telling you what is landslide? How does it happen? How is it measured? Is this problem only in Joshimath?
What is landslide?

Landslide means the gradual or sudden sinking of the earth’s surface. Landslides can be caused by both natural and human causes. According to the US National Oceanic and Atmospheric Administration, landslides are often caused by the pumping, fracking, or mining activities of water, oil, natural gas, or mineral resources.

Landslides can also be caused by natural phenomena such as earthquakes, soil pressure, sliding of land under the weight of glaciers, erosion, formation of depressions in the ground and water getting into fine soil deposited by wind. Subsidence can occur over very large areas such as entire states or provinces, or over very small areas such as the corner of our yard.
How does landslide happen?
Landslides occur when large amounts of groundwater are extracted from certain types of rock. When the water is removed, the rocks fall down on their own. Landslides cannot be overemphasized, as they can range from a small spot like a depression in the ground to large areas. This does not mean that subsidence is not a major event. US states like California, Texas and Florida have lost millions of dollars over the years due to this.

This is a global problem. More than 17,000 square miles in 45 states in the US have been directly affected by landslides. More than 80 percent of the land in America is sunken due to the exploitation of underground water. The increasing exploitation of land and water resources can increase this threat.

The foundation of the lower area of ​​the Basilica in Mexico City is sinking. This phenomenon of subsidence is happening all over Mexico City. It has damaged colonial era buildings. have blocked highways and disrupted water supplies and wastewater drainage. Some buildings have been deemed unsafe and have been closed and many others are in need of repair to be safe.

Land subsidence is often caused by human activities, mainly by the removal of subsurface water. A large crack has begun to appear near Lake Lucerne in San Bernardino County, Mojave Desert, California. The possible reason for this is the fall of ground water level.
How is landslide measured?
One method of measuring changes caused by landslides is the Global Positioning System (GPS). In the US the National Geodetic Survey of the National Oceanic and Atmospheric Administration (NOAA) maintains a national network of high-precision GPS receivers. This is called Continuously Operating Reference Station (CORS). It can be used to detect the change in altitude at the station. Satellites without CORS can measure subsidence by using floating GPS receivers, continuous surveys of geodetic leveling, or by placing sensors in land and water.

Expansion

So far 678 houses have developed cracks in Joshimath, Uttarakhand. A total of 81 families have been shifted to safer places. On Monday, Chief Minister Pushkar Singh Dhami held a meeting with the officers and members of the National Disaster Management Authority (NDMA) at the Chief Minister’s residence. The NDMA members suggested that it is necessary to find out where the water is stagnant in the landslide area and what are the reasons for the landslide. In this news, we are telling you what is landslide? How does it happen? How is it measured? Is this problem only in Joshimath?