LANDSLIDE CAUSES AND TRIGGERING

MECHANISMS

Addis Ababa University, EthiopiaOctober / November 2013

Jan Novotný

Charles University in Prague, Faculty of Science, Czech Republic ARCADIS CZ a.s., division Geotechnika, Czech Republic

Jan.Novotny@arcadis.cz

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.

Landslide Causes and Triggering Mechanisms

D8-LOVOSICEPhoto: J. Novotný

Landslide Causes and Triggering Mechanisms

D8-LOVOSICED8-LOVOSICEPhoto: J. Novotný

Landslide Causes and Triggering Mechanisms

D8-LOVOSICED8-LOVOSICEPhoto: J. Novotný

Landslide Causes and Triggering Mechanisms

D8-LOVOSICED8-LOVOSICEPhoto: J. Novotný

Landslide Causes and Triggering Mechanisms

D8-LOVOSICED8-LOVOSICEPhoto: J. Novotný

Landslide Causes and Triggering Mechanisms

D8-LOVOSICED8-LOVOSICE

PrecipitationHRADEC U STODA

Switzerland

Landslide Causes and Triggering Mechanisms

D8-LOVOSICED8-LOVOSICE

Precipitation

Photo: M.Šedivý

HRADEC U STODA

Landslide Causes and Triggering Mechanisms

D8-LOVOSICED8-LOVOSICE

PrecipitationHRADEC U STODA

Landslide Causes and Triggering Mechanisms

Precipitation x hydrogeological regime

Třebenice landslide (Cretaceous claystones)

After J. Novotný 2005

Landslide Causes and Triggering Mechanisms

SeismicityHRADEC U STODA

Anchorage, Alaska 1964

Landslide Causes and Triggering Mechanisms

Weathering

Photo: J. Novotný

Landslide Causes and Triggering Mechanisms

Tectonic disturbance (relict joints)Tectonic disturbance (relict joints)Tectonic disturbance (relict joints)Tectonic disturbance (relict joints)Brazil, Rio de Janeiro vicinity

saprolites

Photo: J. Novotný

Landslide Causes and Triggering Mechanisms

Brazil, Rio de Janeiro vicinity

saprolitesTectonic disturbance (relict joints)Tectonic disturbance (relict joints)Tectonic disturbance (relict joints)Tectonic disturbance (relict joints)

Photo: J. Novotný

Landslide Causes and Triggering Mechanisms

Saprolites without relict jointsSaprolites without relict jointsSaprolites without relict jointsSaprolites without relict jointsBrazil, Rio de Janeiro vicinity

Photo: J. Novotný

Landslide Causes and Triggering Mechanisms

Karlovy Vary

J. Novotný (2009)

TectonicTectonicTectonicTectonic / / / / gravitationalgravitationalgravitationalgravitational disturbance (relict joints)disturbance (relict joints)disturbance (relict joints)disturbance (relict joints)

Landslide Causes and Triggering Mechanisms

Karlovy VaryTectonic / gravitationalTectonic / gravitationalTectonic / gravitationalTectonic / gravitational disturbance (relict joints)disturbance (relict joints)disturbance (relict joints)disturbance (relict joints)

Landslide Causes and Triggering Mechanisms

Karlovy VaryTectonic / gravitationalTectonic / gravitationalTectonic / gravitationalTectonic / gravitational disturbance (relict joints)disturbance (relict joints)disturbance (relict joints)disturbance (relict joints)

Landslide Causes and Triggering Mechanisms

Karlovy VaryTectonicTectonicTectonicTectonic / / / / gravitationalgravitationalgravitationalgravitational disturbance (relict joints)disturbance (relict joints)disturbance (relict joints)disturbance (relict joints)

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.

Landslide Causes and Triggering Mechanisms

4m12m

Photo: J. Novotný

Undercutting of the toe of the slope

Landslide Causes and Triggering Mechanisms

Load at the top of the slope

Photo: J. Novotný

Landslide Causes and Triggering Mechanisms

Load at the top of the slope

J. NovotnýPhoto: J. Novotný

Photo: J. Novotný

Landslide Causes and Triggering Mechanisms

Piping by rapid opening of the cut in fully saturat ed sands

Photo: J. Novotný