What human activities can trigger landslides in your community?

What human activities can trigger landslides in your community?

Construction works, legal and illegal mining, as well as the unregulated cutting of hills (carving out land on a slope) caused most of the human-induced landslides.

How many people are killed by landslides every year?

25-50 people

What damage does landslides cause?

Every year, landslides in the U.S. cause roughly $3.5 billion in damage and kill between 25 and 50 people. Casualties in the U.S. are primarily caused by rock falls, rock slides, and quick-moving debris.

How does global warming affect landslides?

Climate change can lead to more landslides, but in some regions, it can lead to droughts or more vegetation, which can make landslides less likely.

What is the impact of rain induced landslide to the community?

Rainfall-induced landslides are a common occurrence in terrain with steep topography and soils that have degradable strength. Rainfall infiltration into a partially saturated slope of infinite extent can lead to either a decrease or complete elimination of soil suction, compromising the slopes’ stability.

What are the causes of rainfall-induced landslide?

Many rainfall-induced landslides transform into debris flows (fast-moving slurries of water, soil, and rock) as they travel down steep slopes, especially those that enter stream channels where they may mix with additional water and sediment. See more on the overview page.

What are the most common signs of rainfall-induced landslides?

Landslide warning signs

• Springs, seeps or saturated ground in areas that are not usually wet.
• New cracks or unusual bulges in the ground, street or sidewalks.
• Soil moving away from foundations, or the tilting or cracking of concrete floors and foundations.
• Sunken or down-dropped road beds.

How rain affects the stability of land formation?

The rainfalls have a double effect: reduce the soil cohesion and increase the pore pressure. This influence of the rainfall on slope stability depends of the duration and intensity of the rainfall. This triggering factor is generally rainfall or earthquakes.

How can we reduce erosion?

You can reduce soil erosion by:

1. Maintaining a healthy, perennial plant cover.
2. Mulching.
3. Planting a cover crop – such as winter rye in vegetable gardens.
4. Placing crushed stone, wood chips, and other similar materials in heavily used areas where vegetation is hard to establish and maintain.

What can Erosion lead to?

The effects of soil erosion go beyond the loss of fertile land. It has led to increased pollution and sedimentation in streams and rivers, clogging these waterways and causing declines in fish and other species. And degraded lands are also often less able to hold onto water, which can worsen flooding.

How does erosion change the physical surface?

Physical erosion describes the process of rocks changing their physical properties without changing their basic chemical composition. Physical erosion often causes rocks to get smaller or smoother. Rocks eroded through physical erosion often form clastic sediments.