MAIERATO LANDSLIDE

MAIERATO LANDSLIDE

LCI : ITA1801121525
Main Information
Landslide Name : MAIERATO LANDSLIDE
Latitude : 38:41:04 N
Longitude : 16:11:07 E
Location
City / District : MAIERATO
Province : VIBO VALENTIA
Country : Italy
Reporter
Reporter 1 : GIOVANNA CAPPARELLI
Reporter 2 : PASQUALE VERSACE
Landslide Type
Material : Rock, Debris
Movement : Flow
Velocity (mm/sec) : Very Rapid
Depth (m) : Deep-Moderate
Slope (degree) : Gentle
Volume (m³) : Large
Date of Occurence
Date of Occurence : Feb 15, 2010
Other Information
Land Use Source area : Farming, Pasture, Urban area, Human settlement, Road
Run-out/deposition area : Farming, Pasture, Urban area, Human settlement, Road
Other Activity : Active in the past
Triggering Factor : Human activity and rainfall
Death(s) & Missing : NO
Houses and other structural damage : YES
Photo of landslide : FOTO.jpg
Google earth kmz file : Frana_Maierato_2010.kmz
Plan of landslide : PLAN OF LANDSLIDE1515767046.pdf
Cross section of landslide : SECTION.pdf
Reference (paper/report) : https://www.researchgate.net/publication/308015414_Kinematics_of_the_Maierato_Landslide_Calabria_Southern_Italy https://www.researchgate.net/publication/285948650_Geomatics_activities_for_monitoring_the_large_landslide_of_Maierato_Italy https://www.researchgate.net/publication/308792641_Esperienze_di_monitoraggio_topografico_di_grandi_frane_i_casi_di_Gimigliano_e_Maierato https://www.researchgate.net/publication/281111519_Analysis_of_the_rainfall_preceding_the_activation_of_the_large_Maierato_landslide_in_2010 http://www.cnr.it/istituti/Allegato_95848.pdf?LO=01000000d9c8b7a6090000000c0000002caf00006e679c53000000000100000000000000000000000000000000000000000000000000000000000000000000000000000000000000&type=application/pdf
Testing graph : TESTING GRAPH.pdf
Monitoring graph : -
Video of moving landslides including 3D simulation : https://www.youtube.com/watch?v=mL4XBpEg97I
Description :

Maierato is located in Vibo Valentia’s territory, few kilometers from the Mar Tirreno in central Calabria. The Maierato’s town rises on a slope without particularly accentuated inclinations, but it is deeply disturbed by an enormous and ancient gravitational deformation (Guerricchio et Al., 2010). Moreover, the territory is characterized by ancient and “Great Lands”, these probably born as a result of marine regressions during glacial periods. In addition, the predisposition to landslide events was strongly characterized by the disastrous earthquake occurred in 1973, which generated fractures and considerable masses dislocated over the whole slope. As a consequence, the seep rains feed a powerful aquifer localized in the permeable layers of deposits. Due to the almost verticality of the cracks, the outflow occurs with a high gradient (about 10%) which, in case of abundant infiltrations, can generate a real “underground torrent”. The landslide of February 15th 2010 was preceded by a long phase of deformation that later produced the collapsed of slope. The elevation speed of the phenomenon seems to suggest that the movement has developed on a completely fluidized substrate, allowing to the ancient landslide debris to mobilize with great energy. The water level has generated pressures in order to cancel the effective stress, inducing a real liquefaction. The conditions favored a collapse in according to a mechanism of multiple rotational sliding, followed by a deep “disarticulation” of the landslide. It could be considered as a “debris flow with rock blocks”. The landslide movement has a main scarp with a development of approximately 1.1 km and with a maximum depth about 50 m. The average depth of the landslide body was estimated at 25-30 m, with a volume that exceeds 8 million m3.

Maierato Landslide

Maierato Landslide

LCI : ITA1503081339
Main Information
Landslide Name : Maierato Landslide
Latitude : 38:40:30 N
Longitude : 16:05:50 E
Location
City / District : Maierato
Province : Vibo Valentia
Country : Italy
Reporter
Reporter 1 : Bintri Simbolon
Reporter 2 :
Landslide Type
Material : Earth
Movement : Slide
Velocity (mm/sec) : Extremely Rapid
Depth (m) : Unknown
Slope (degree) : Unknown
Volume (m³) : Unknown
Date of Occurence
Date of Occurence : Feb 15, 2010
Other Information
Land Use Source area : Forest
Run-out/deposition area : -
Other Activity : Active in the past
Triggering Factor : Rainfall
Death(s) & Missing : -
Houses and other structural damage : -
Photo of landslide : 130222034426_80787c18-f92c-4ebd-917c-4deb38536eb4.docx
Google earth kmz file : -
Plan of landslide : -
Cross section of landslide : -
Reference (paper/report) : -
Testing graph : -
Monitoring graph : -
Video of moving landslides including 3D simulation : -
Description :

A large landslide formed at Maierato (Vibo Valencia District), Southern Italy, on 15 February 2010, at 1430 hours local time, when rapid failure occurred after several days of preliminary movements. The landslide has an area of 0.3 km2, a runout distance of 1.2 km and an estimated volume of about 10 Mm3. The landslide caused nearly 2,300 inhabitants to be evacuated, with high economic losses. The most probable trigger of the landslide was the cumulative precipitation over the preceding 20 days (having a return period of more than 100 years), which followed a long period of 4–5 months of heavy rainfall (of about 150% of the average rainfall of the period). This report presents a summary of our findings pertinent to the landslide’s activities based on our field investigations. In particular, this report covers (1) details of land deformation caused by the landslide, (2) geology pertinent to landslide development, (3) identification of the landslide mechanism and its triggering factors based on the analysis of the boring core specimens and landform features, as well as the available video of the event, and (4) preliminary evaluation of the stability of the original slope before the landslide using the finite element-based shear strength reduction method. The aim of the paper was to describe the landslide and explain its mechanism of occurrence.