Landslide Mobility in Central America: Modelling Volcanic Debris Avalanches and Volcanic Debris Flows

2010 ◽  
Author(s):  
K.H. Tiedemann
Keyword(s):  
Central America ◽  
Debris Flows ◽  
Debris Avalanches ◽  
Landslide Mobility ◽  
Volcanic Debris

Magnitude–frequency relationships of debris flows and debris avalanches in relation to slope relief

Geomorphology ◽  
2008 ◽  
Vol 96 (3-4) ◽  
pp. 355-365 ◽  
Author(s):  
Oldrich Hungr ◽  
Scott McDougall ◽  
Mike Wise ◽  
Michael Cullen
Keyword(s):  
Debris Flows ◽  
Debris Avalanches

A probabilistic model for assessing debris flow propagation at regional scale: a case study in Campania region, Italy

2021 ◽  
Author(s):  
Luca Crescenzo ◽  
Gaetano Pecoraro ◽  
Michele Calvello ◽  
Richard Guthrie
Keyword(s):  
Debris Flow ◽  
Debris Flows ◽  
Regional Scale ◽  
Erosion And Deposition ◽  
Campania Region ◽  
Source Areas ◽  
Model Input ◽  
Travel Path ◽  
Debris Avalanches ◽  
Modelling Approach

<p>Debris flows and debris avalanches are rapid to extremely rapid landslides that tend to travel considerable distances from their source areas. Interaction between debris flows and elements at risk along their travel path may result in potentially significant destructive consequences. One of the critical challenges to overcome with respect to debris flow risk is, therefore, the credible prediction of their size, travel path, runout distance, and depths of erosion and deposition. To these purposes, at slope or catchment scale, sophisticated physically-based models, appropriately considering several factors and phenomena controlling the slope failure mechanisms, may be used. These models, however, are computationally costly and time consuming, and that significantly hinders their applicability at regional scale. Indeed, at regional scale, debris flows hazard assessment is usually carried out by means of qualitative approaches relying on field surveys, geomorphological knowledge, geometric features, and expert judgement.</p><p>In this study, a quantitative modelling approach based on cellular automata methods, wherein individual cells move across a digital elevation model (DEM) landscape following behavioral rules defined probabilistically, is proposed and tested. The adopted model, called LABS, is able to estimate erosion and deposition soil volumes along a debris flow path by deploying at the source areas autonomous subroutines, called agents, over a 5 m spatial resolution DEM, which provides the basic information to each agent in each time-step. Rules for scour and deposition are based on mass balance considerations and independent probability distributions defined as a function of slope DEM-derived values and a series of model input parameters. The probabilistic rules defined in the model are based on data gathered for debris flows and debris avalanches that mainly occurred in western Canada. This study mainly addresses the applicability and the reliability of this modelling approach to areas in southern Italy, in Campania region, historically affected by debris flows in pyroclastic soils. To this aim, information on inventoried debris flows is used in different study areas to evaluate the effect on the predictions of the model input parameter values, as well as of different native DEM resolutions.</p>

Volcanic debris avalanches

2015 ◽  
pp. 139-164
Author(s):  
Benjamin van Wyk de Vries ◽  
Audray Delcamp
Keyword(s):  
Debris Avalanches ◽  
Volcanic Debris

Prehistoric debris avalanches from Mount Cayley volcano, British Columbia

1991 ◽  
Vol 28 (9) ◽  
pp. 1365-1374 ◽  
Author(s):  
S. G. Evans ◽  
G. R. Brooks
Keyword(s):  
British Columbia ◽  
Economic Development ◽  
Public Safety ◽  
Debris Avalanches ◽  
Western Flank ◽  
Historic Time ◽  
Volcanic Debris ◽  
Upper Slope

An investigation of diamicton units exposed in an extensive accumulation of volcanic debris in the Squamish valley, west of Mount Cayley volcano, has yielded evidence for at least three major debris avalanches, initiated by the collapse of the western flank of Mount Cayley in the mid-Holocene. Radiocarbon ages obtained from tree fragments contained in the deposits indicate that the events took place at 4800, 1100, and 500 BP. All three debris avalanches dammed the Squamish River and formed temporary lakes upstream of the debris. Failure of the cone took place after considerable dissection of the original edifice had exposed weak pyroclastic materials at the base of the steep upper slope of the volcano. No evidence of older debris avalanches from Mount Cayley has been discovered. Smaller scale debris avalanches probably have been common, and at least two have occurred in historic time (1963 and 1984). Debris avalanches from Mount Cayley and the effects of a possible damming of the Squamish River are major geomorphic hazards to public safety and economic development in the Squamish valley.

scholarly journals Longitudinal downsizing of hummocks by the freely-spreading volcanic debris avalanches in Japan

2010 ◽  
Vol 49 (2) ◽  
pp. 55-67 ◽  
Author(s):  
Hidetsugu Yoshida ◽  
Toshihiko Sugai ◽  
Hiroo Ohmori
Keyword(s):  
Debris Avalanches ◽  
Volcanic Debris

A debris flow triggered by the breaching of a moraine-dammed lake, Klattasine Creek, British Columbia

1985 ◽  
Vol 22 (10) ◽  
pp. 1492-1502 ◽  
Author(s):  
John J. Clague ◽  
S. G. Evans ◽  
Iain G. Blown
Keyword(s):  
British Columbia ◽  
Debris Flow ◽  
Debris Flows ◽  
Southern Coast ◽  
Coast Mountains ◽  
Debris Avalanches ◽  
Unconsolidated Sediment ◽  
Sudden Release ◽  
Dammed Lake ◽  
Unusual Origin

A very large debris flow of unusual origin occurred in the basin of Klattasine Creek (southern Coast Mountains, British Columbia) between June 1971 and September 1973. The flow was triggered by the sudden release of up to 1.7 × 106 m3 of water from a moraine-dammed lake at the head of a tributary of Klattasine Creek. Water escaping from the lake mobilized large quantities of unconsolidated sediment in the valley below and thus produced a debris flow that travelled in one or, more likely, several surges 8 km downvalley on an average gradient of 10° to the mouth of the stream. Here, the flow deposited a sheet of coarse bouldery debris up to about 20 m thick, which temporarily blocked Homathko River. Slumps, slides, and debris avalanches occurred on the walls of the valley both during and in years following the debris flow. Several secondary debris flows of relatively small size have swept down Klattasine Creek in the 12–14 years since Klattasine Lake drained.

Emplacement and transformations of volcanic debris avalanches-A case study at El Misti volcano, Peru

2017 ◽  
Vol 340 ◽  
pp. 68-91 ◽  
Author(s):  
Karine Bernard ◽  
Jean-Claude Thouret ◽  
Benjamin van Wyk de Vries
Keyword(s):  
Debris Avalanches ◽  
Volcanic Debris
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