Landslide Resources

Science Center Objects

The New Jersey Geological and Water Survey maintains a database of Landslides in the state and updates the database as new landslides occur. This information is used by The NJ State Police, Office of Emergency Management as well as federal, state, county, and local government officials and consultants to assist in hazard mitigation planning. Landslides in New Jersey can damage homes, utilities, cover roads, highways and railroad tracks. They are responsible for millions of dollars in damages each year. 

 

depiction of the mechanics of a landslide

graphic illustration of the parts of a landslide.  (Public domain.)

SHALLOW LANDSLIDES

Shallow landslides typically originate in uppermost soil or rock layers on steep slopes and often form slumps or fast-moving earth and debris flows. These types of landslides are often triggered by sustained and intense rainfall and are usually fast moving. Typically the landslides that occur in New Jersey are considered shallow in nature.

DEEP-SEATED LANDSLIDES

Deep-seated landslides are those where the zone of failure is below the rooting depth of trees and vegetation. They are often slow moving, but can also move rapidly. Deep-seated landslides can cover large areas and devastate infrastructure and housing developments. These landslides usually occur as translational slides, rotational slides, or large block slides. Deep-seated landslides are typically much larger than shallow landslides, in terms of both surface area and volume. A deep-seated landslide may appear stable for years, decades, or even centuries. These long-lived features can be partially or entirely reactivated for a variety of reasons.

For more information on landslide types and processes please click here

1 (Text adapted from Washington State Department of Natural Resources Landslides webpage)

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USGS Landslides Hazards Program Site