What is deep-seated landslide?
Deep-seated landslides are rooted in bedrock, are often slow moving, and can cover large areas and devastate infrastructure and housing developments. Deep-seated landslides usually occur as translational slides, rotational slides, or large block slides.
What causes deep-seated landslides?
Slow-moving, deep-seated landslides are those in which the bulk of the slide plane lies below the roots of forest trees. These slides tend to be a result of change in the geologic and hydrologic processes in the area of the landslide, such as seismic shaking or increased levels of groundwater.
What conditions create a slow deep-seated landslide?
Landslides, particularly debris flows, often are triggered during or soon after intense rain storms. However, some landslides, especially deep-seated landslides, can be initiated by the slow deep infiltration of rainfall into the ground and subsequent buildup of ground water levels within thick soil.
What are 4 types of landslides?
Landslides are part of a more general erosion or surficial pro- cess known as mass wasting, which is simply the downslope movement of earth or surface materials due to gravity. They are classified into four main types: fall and toppling, slides (rotational and translational), flows and creep.
Which landslide type moves the fastest?
Mudslides like this one are the fastest-moving type of landslide, or “mass wasting.” Mudslides can move at speeds of 80 kilometers (50 miles) per hour.
What are the 4 types of landslides?
What are the effects of landslides?
The impact of a landslide can be extensive, including loss of life, destruction of infrastructure, damage to land and loss of natural resources. Landslide material can also block rivers and increase the risk of floods.
What is the most destructive type of landslide?
Volcanic landslides, also called lahars, are among the most devastating type of landslides.
What is the most common type of landslide?
A rotational slide with one or more curved slip sur- faces where the movement of material is incomplete, leaving individual slumped blocks, is referred to as a slump. Slides are probably the most common and overall possibly the most destructive type of landslide to hillside developments.
What is the difference between a slump and a landslide?
Landslides involve rock and debris moving downslope along a planar surface, whereas slumping usually occurs along a curved interface and as a single large unit.