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3.1 Causes of Landslides Landslide occurs when ever downward pull of gravity or shearing stresses overcome the static and resisting forces of the natural earth materials.
Jan 1, 1995 · Various studies have grouped causative factors of landslides into internal and external causes (Prasad, 1995; Popescu, 1996;Huabin et al., 2005). Internal causes include factors such as...
- TYPES OF LANDSLIDES
- LANDSLIDE CAUSES
- Debris flow
- Earthflow
- Creep
- Landslides and Water
- Landslide Mitigation—How to Reduce the Effects of Landslides
The term “landslide” describes a wide variety of processes that result in the downward and outward movement of slope-forming materials including rock, soil, artificial fill, or a com-bination of these. The materials may move by falling, toppling, sliding, spreading, or flowing. Figure 1 shows a graphic illustration of a landslide, with the commonly...
Geological causes Weak or sensitive materials Weathered materials Sheared, jointed, or fissured materials Adversely oriented discontinuity (bedding, schistosity, fault, unconformity, contact, and so forth) Contrast in permeability and/or stiffness of materials Morphological causes Tectonic or volcanic uplift Glacial rebound Fluvial, wave, or glacia...
I Curvedtreetrunks Tiltedpole Maintrack Depositionalarea
Firmclay Softclaywith water-bearingsilt andsandlayers Bedrock
Figure 3. These schematics illustrate the major types of landslide movement that are described in the previous pages. For additional information on these processes and where to find photos, please see “Where to Go For More Information” at the end of this fact sheet. Although there are multiple types of causes of landslides, the three that cause mos...
Slope saturation by water is a primary cause of landslides. This effect can occur in the form of intense rainfall, snowmelt, changes in ground-water levels, and water-level changes along coastlines, earth dams, and the banks of lakes, reservoirs, canals, and rivers. Landsliding and flooding are closely allied because both are related to precipitati...
Vulnerability to landslide hazards is a function of location, type of human activity, use, and frequency of landslide events. The effects of landslides on people and structures can be lessened by total avoidance of land-slide hazard areas or by restricting, prohibit-ing, or imposing conditions on hazard-zone activity. Local governments can reduce l...
Section I. Basic Information About Landslides PDF (25.8 MB) Part A. What is a Landslide? Part B. Basic Landslide Types. Part C. Where Do Landslides Occur? Part D. What Causes Landslides? Part E. What are the Effects and Consequences of Landslides? Part F. Interrelationship of Landslides with Other Natural Hazards—The Multiple Hazard Effect ...
Landslide Causes and Triggering Mechanisms Highland, L.M., and Bobrowsky, Peter, 2008, The landslide handbook—A guide to understanding landslides: Reston, Virginia, U.S. Geological Survey Circular 1325, 129 p.
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Keywords: landslide, causal factors, remedial measures, back analysis. 1. Foreword. Landslides are frequently responsible for considerable losses of both money and lives, and the severity of the landslide problem worsens with increased urban development and change in land use.
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The primary cause of landslide is the influence of gravity on weakened material that make up a sloping area of land. Other factors that may cause landslide can be categorized in the following areas: geological factors, morphological factors, physical factors and factors associated with human activities.
