Landslide

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Retrieved November 23, Retrieved 6 December Retrieved August 13, Australian Recording Industry Association. Retrieved March 19, Discography Awards and nominations Dixie Chicks: Globally, landslides cause billions of dollars in damages and thousands of deaths and injuries each year. Who is most at risk for landslides? As people move into new areas of hilly or mountainous terrain, it is important to understand the nature of their potential exposure to landslide hazards, and how cities, towns, and counties can plan for land-use, engineering of new construction and infrastructure, and other measures which will reduce the costs of living with landslides.

Although the physical causes of many landslides cannot be removed, geologic investigations, good engineering practices, and effective enforcement of land-use management regulations can reduce landslide hazards.

What is a landslide and what causes one?

Do human activities cause landslides? Yes, in some cases human activities can be a contributing factor in causing landslides. Many human-caused landslides can be avoided or mitigated. They are commonly a result of building roads and structures without adequate grading of slopes, of poorly planned alteration of drainage patterns, and of disturbing old landslides. Where can I find landslide information for my area? Geological Survey Landslide Hazards Program that collects and distributes all forms of information related to landslides.

The NLIC is designed to serve landslide researchers, geotechnical practitioners engaged in landslide stabilization, and anyone else concerned in any way with landslide education, hazard, safety, and mitigation. Every state in the US has a geoscience agency and most have some landslide information.

What was the most expensive landslide to fix in the United States? The landslide occurred during the spring of , when unseasonably warm weather caused rapid snowmelt to saturate the slope.

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It also flowed across the Spanish Fork River, forming a dam. The impounded river water inundated the small town of Thistle. The inhabitants of the town of Thistle, directly upstream from the landslide, were evacuated as the lake began to flood the town, and within a day the town was completely covered with water. Populations downstream from the dam were at risk because of the possible overtopping of the landslide by the lake.

This could cause a catastrophic outburst of the dam with a massive flood downstream. Eventually, a drain system was engineered to drain the lake and avert the potential disaster. How many deaths result from landslides? An average of between 25 and 50 people are killed by landslides each year in the United States.

Landslide (Fleetwood Mac song)

The worldwide death toll per year due to landslides is in the thousands. Most landslide fatalities are from rock fall, debris-flows, or volcanic debris flows. What should I know about wildfires and debris flows? Wild land fires are inevitable in the western United States.

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Expansion of human development into forested areas has created a situation where wildfires can adversely affect lives and property, as can the flooding and landslides that occur in the aftermath of the fires. There is a need to develop tools and methods to identify and quantify the potential hazards posed by landslides produced from burned watersheds. Post-fire landslide hazards include fast-moving, highly destructive debris flows that can occur in the years immediately after wildfires in response to high intensity rainfall events, and those flows that are generated over longer time periods accompanied by root decay and loss of soil strength.

Post-fire debris flows are particularly hazardous because they can occur with little warning, can exert great impulsive loads on objects in their paths, and can strip vegetation, block drainage ways, damage structures, and endanger human life. Wildfires could potentially result in the destabilization of pre-existing deep-seated landslides over long time periods. How do landslides cause tsunamis?

Tsunamis are large, potentially deadly and destructive sea waves, most of which are formed as a result of submarine earthquakes.

Landslide mitigation and prevention

They may also result from the eruption or collapse of island or coastal volcanoes and the formation of giant landslides on marine margins. These landslides, in turn, are often triggered by earthquakes.

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Tsunamis can be generated on impact as a rapidly moving landslide mass enters the water or as water displaces behind and ahead of a rapidly moving underwater landslide. What are some examples of landslides that have caused tsunamis? The Alaska earthquake caused deaths in Alaska alone, with of those due to tsunamis generated by tectonic uplift of the sea floor, and by localized subareal and submarine landslides.

The earthquake shaking caused at least 5 local slide-generated tsunamis within minutes after the shaking began. An eyewitness account of the tsunami caused by the movement and landslides of the Alaska earthquake. Research in the Canary Islands concludes that there have been at least five massive volcano landslides that occurred in the past, and that similar large events may occur in the future.

Giant landslides have the potential of generating large tsunami waves at close and also very great distances and would have the potential to devastate large areas of coastal land as far away as the eastern seaboard of North America. Rock falls and rock avalanches in coastal inlets, such as those that have occurred in the past at Tidal Inlet, Glacier Bay National Park, Alaska, have the potential to cause regional tsunamis that pose a hazard to coastal ecosystems and human settlements. On July 9, , a magnitude M 7.

The landslide generated a wave that ran up m on the opposite shore and sent a m high wave through Lituya Bay, sinking two of three fishing boats and killing two persons. How soon does the danger of landslides end after the rain stops? Residents near mountain slopes, canyons, and landslide prone areas should stay alert even after heavy rain subsides.

Areas that have been burned by recent wildfires are highly susceptible to debris-flow activity that can be triggered by significantly less rainfall than that which triggers debris flows from unburned hill slopes. What was the biggest landslide in the world? The volume of material was 2. What was the biggest prehistoric landslide?

The landslide is located on the Kabir Kuh anticline in Southwest Iran at 33 degrees north latitude, The landslide has a volume of about 20 cubic kilometers, a depth of m, a travel distance of 14 km and a width of 5 km.

Landslide - Wikipedia

This means that about 50 billion tons of rock moved in this single event! Types of Landslides Rotational slide: Learn More in these related Britannica articles: Several since have been devastating, including one in in what is now Bihar state that killed more than 10, people. In another tremor the Bhuj earthquake , farther from the mountains, in Gujarat state, was less powerful but caused extensive damage,….

Shear stress , force tending to cause deformation of a material by slippage along a plane or planes parallel to the imposed stress. The resultant shear is of great importance in nature, being intimately related to the downslope movement of earth materials and to earthquakes. Shear stress may occur in solids…. The Himalayas mass movements In mass movement. Articles from Britannica Encyclopedias for elementary and high school students. Help us improve this article! Contact our editors with your feedback.

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