Earth Flows

2012 ◽  
Keyword(s):  
Earth Flows

Landslides at Lago Riñihue, Chile

1963 ◽  
Vol 53 (6) ◽  
pp. 1403-1414
Author(s):  
Stanley N. Davis ◽  
Juan Karzulovíc K.
Keyword(s):  
Lake Level ◽  
Lateral Spreading ◽  
Unconsolidated Sediments ◽  
Strong Earthquakes ◽  
Earth Flows ◽  
The City

ABSTRACT Strong earthquakes of 22 May 1960 produced three large landslides which blocked the outlet of Lago Riñihue, 65 kilometers east of the city of Valdivia, Chile. The lake level rose 26.5 meters before water began discharging through artificially constructed canals during the last week in June, 1960. The largest landslide involved about 30 million cubic meters of unconsolidated sediments, the intermediate landslide about 6 million cubic meters, and the smallest landslide about 2 million cubic meters. The surface of rupture of the largest landslide is within an 80-meter sequence of Pleistocene lake clays. The clays are underlain by till and overlain by outwash sands and gravels. Movement of the landslide is interpreted as having been principally block gliding and lateral spreading. Secondary landslides within the larger landslide were produced by rotational slumping, debris falls, and earth flows. Several ancient landslides exist in the vicinity of Lago Riñihue, the largest involving more than 100 million cubic meters of unconsolidated sediments. Many of the older landslides also were probably triggered by earthquakes.

Activation of Cryogenic Earth Flows and Formation of Thermocirques on Central Yamal as a Result of Climate Fluctuations

2017 ◽  
pp. 209-216 ◽  
Author(s):  
Artem Khomutov ◽  
Marina Leibman ◽  
Yury Dvornikov ◽  
Anatoly Gubarkov ◽  
Damir Mullanurov ◽  
...  
Keyword(s):  
Climate Fluctuations ◽  
Earth Flows

scholarly journals Earth flows; morphology, mobilization, and movement

1983 ◽  
Author(s):  
David K. Keefer ◽  
Arvid M. Johnson
Keyword(s):  
Earth Flows

Earth flows

2007 ◽  
pp. 397-400
Author(s):  
Rex L. Baum
Keyword(s):  
Earth Flows

scholarly journals Estimating mass-wasting processes in active earth slides – earth flows with time-series of High-Resolution DEMs from photogrammetry and airborne LiDAR

2009 ◽  
Vol 9 (2) ◽  
pp. 433-439 ◽  
Author(s):  
A. Corsini ◽  
L. Borgatti ◽  
F. Cervi ◽  
A. Dahne ◽  
F. Ronchetti ◽  
...  
Keyword(s):  
Time Series ◽  
High Resolution ◽  
Large Scale ◽  
Airborne Lidar ◽  
Mitigation Measures ◽  
Mass Wasting ◽  
Aerial Photos ◽  
Use Of Time ◽  
Elevation Changes ◽  
Earth Flows

Abstract. This paper deals with the use of time-series of High-Resolution Digital Elevation Models (HR DEMs) obtained from photogrammetry and airborne LiDAR coupled with aerial photos, to analyse the magnitude of recently reactivated large scale earth slides – earth flows located in the northern Apennines of Italy. The landslides underwent complete reactivation between 2001 and 2006, causing civil protection emergencies. With the final aim to support hazard assessment and the planning of mitigation measures, high-resolution DEMs are used to identify, quantify and visualize depletion and accumulation in the slope resulting from the reactivation of the mass movements. This information allows to quantify mass wasting, i.e. the amount of landslide material that is wasted during reactivation events due to stream erosion along the slope and at its bottom, resulting in sediment discharge into the local fluvial system, and to assess the total volumetric magnitude of the events. By quantifying and visualising elevation changes at the slope scale, results are also a valuable support for the comprehension of geomorphological processes acting behind the evolution of the analysed landslides.

Structurally controlled earth flows of the Benevento province (Southern Italy)

2010 ◽  
Vol 69 (3) ◽  
pp. 487-500 ◽  
Author(s):  
P. Revellino ◽  
G. Grelle ◽  
A. Donnarumma ◽  
F. M. Guadagno
Keyword(s):  
Southern Italy ◽  
Earth Flows

A review of the classification of landslides of the flow type

2001 ◽  
Vol 7 (3) ◽  
pp. 221-238 ◽  
Author(s):  
Oldrich Hungr ◽  
S. G. Evans ◽  
M. J. Bovis ◽  
J. N. Hutchinson
Keyword(s):  
Debris Flow ◽  
Debris Flows ◽  
Large Scale ◽  
Debris Avalanche ◽  
Basic Material ◽  
Morphological Aspects ◽  
Flow Slides ◽  
Size Limits ◽  
Plastic Clays ◽  
Earth Flows

Abstract As a result of the widespread use of the landslide classifications of Varnes (1978), and Hutchinson (1988), certain terms describing common types of flow-like mass movements have become entrenched in the language of engineering geology. Example terms include debris flow, debris avalanche and mudslide. Here, more precise definitions of the terms are proposed, which would allow the terms to be retained with their original meanings while making their application less ambiguous. A new division of landslide materials is proposed, based on genetic and morphological aspects rather than arbitrary grain-size limits. The basic material groups include sorted materials: gravel, sand, silt, and clay, unsorted materials: debris, earth and mud, peat and rock. Definitions are proposed for relatively slow non-liquefied sand or gravel flows, extremely rapid sand, silt or debris flow slides accompanied by liquefaction, clay flow slides involving extra-sensitive clays, peat flows, slow to rapid earth flows in nonsensitive plastic clays, debris flows which occur in steep established channels or gullies, mud flows considered as cohesive debris flows, debris floods involving massive sediment transport at limited discharges, debris avalanches which occur on open hill slopes and rock avalanches formed by large scale failures of bedrock.

Plan curvature and landslide probability in regions dominated by earth flows and earth slides

2007 ◽  
Vol 91 (2-4) ◽  
pp. 117-134 ◽  
Author(s):  
Gregory C. Ohlmacher
Keyword(s):  
Earth Flows
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