3 edition of A Model for creeping flow in landslides found in the catalog.
A Model for creeping flow in landslides
|Statement||by W.Z. Savage and A.F. Chleborad|
|Series||Open-file report -- 81-124, Open-file report (Geological Survey (U.S.)) -- 81-124|
|Contributions||Chleborad, A. F, Geological Survey (U.S.)|
|The Physical Object|
This book reflects the latest research results in computer modelling of landslide-induced debris flows. The book establishes an understanding of the initiation and propagation mechanisms of landslides by means of numerical simulations, so that mitigation strategies to reduce the long-term losses from landslide hazards can be devised. The model will also help developers to make a more accurate assessment of the risks at candidate locations for hydropower plants, says David Gernaat, a computer modeller at .
The model basis is the Jeffreys equation for Newtonian flow, modified for a Bingham fluid, and a series of heat loss equations. Adjustable relationships are used to calculate cooling, crystallization and down-channel increases in viscosity and yield strength, as well as the resultant decrease in velocity. This book is one out of 8 IAEG XII Congress volumes, and deals with Landslide processes, including: field data and monitoring techniques, prediction and forecasting of landslide occurrence, regional landslide inventories and dating studies, modeling of slope instabilities and secondary hazards (e.g. impulse waves and landslide-induced tsunamis, landslide dam failures and breaching), hazard and.
Debris Flow Definition. A debris flow is a moving mass of loose mud, sand, soil, rock, water and air that travels down a slope under the influence of gravity. To be considered a debris flow, the moving material must be loose and capable of "flow," and at least 50% of . Book Description. Two-volume set, includes a free CD containing the full contents of the book. Landslides and Engineered Slopes: Protecting Society through Improved Understanding comprises the Proceedings of the 11th International Symposium on Landslides and 2nd North American Symposium on Landslides (Banff, Alberta, Canada, June ). Included are thirteen keynote and invited papers, .
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Year Published: A depth-averaged debris-flow model that includes the effects of evolving dilatancy. Physical basis.
To simulate debris-flow behaviour from initiation to deposition, we derive a depth-averaged, two-phase model that combines concepts of critical-state soil mechanics, grain-flow mechanics and fluid mechanics. Year Published: Modelling landslide liquefaction, mobility bifurcation and the dynamics of the Oso disaster.
Some landslides move slowly or intermittently downslope, but others liquefy during the early stages of motion, leading to runaway acceleration and high-speed runout across low-relief terrain. Creeping landslides are a common feature in mountainous areas, and cause significant damage to buildings and infrastructure.
The long-term stability of slowly moving landslides was a subject of early interest in soil mechanics (e.g. Terzaghi,; Skempton, ; Skempton & La Rochelle, ; Bjerrum, ).In these studies, the analysis focused mainly on progressive failure in Cited by: In the analysis of landslide mechanisms, slow relaxation processes have explained delayed failures in slowly creeping sub-aerial landslides constrained by obstacles [28, 29] and underwater.
A simple analytical model is proposed to quantify evolution of a creeping landslide stabilised by a retaining wall, or by a natural barrier at the bottom of the sliding mass.
The Particle Flow Code (PFC) model, developed by Cundall and Strack (), uses circular (in 2-D) or spherical (in 3-D) particles that can be bonded together or broken apart under certain.
It triggers numerous landslides in a mile radius. Each of these events represents some type of slope failure. Slope failure, also referred to as mass wasting, is the downslope movement of rock debris and soil in response to gravitational stresses.
Three major types of mass wasting are classified by the type of downslope movement. Large catastrophic landslides are a constant threat to human communities and infrastructure works. Their danger derives from the large volumes of rock mass they involve (well in excess of 1 million m 3) and their high estimated sliding velocities (10 m/s to m/s).
Sosio et al. () list a number of historical rock avalanches and their main characteristics. Abstract. This chapter is devoted to the approximate determination of the velocity field in a shallow layer of ice or granular soil, treated as a non-Newton ian material flowing under the action of its own weight and assuming its velocity to be so small that Stokes flow can be limiting cases can be analyzed: (i) The deforming material flows on a steep slope (which is the case for.
Dr.G. Shanmugam, in Handbook of Petroleum Exploration and Production, Debris flow: A debris flow is a sediment flow with plastic rheology and laminar state from which deposition occurs through “freezing” en terms debris flow and mass flow are used interchangeably because each exhibits plastic flow behavior with shear stress distributed throughout the mass (Nardin et al.
Killer Landslides PBS Airdate: Novem like mud flows and rock falls move rapidly and can flow long distances. Rapid, deep landslides that travel far, like the one in Oso, are the.
Landslides and Engineered Slopes. Experience, Theory and Practice contains the invited lectures and all papers presented at the 12th International Symposium on Landslides, (Naples, Italy, June ).
The book aims to emphasize the relationship. Hence, in the proposed model, the unsaturated water flow taking place within the soil cover is coupled with the saturated water flow in the perched aquifer. The application of the model to the simulation of the slope hydrologic behavior over a period of 11 years, between –, provides realistic results in terms of soil storage, epikarst.
The Italian experience / 29 Integrated stratigraphic and morphological investigation of the Twin Slide complex offshore southern Sicily Author: Mr. KUHLMANN, Jannis 1 Co-Authors: ASIOLI, A.
2; Prof. STRASSER, Michael 3; TRINCARDI, F. 4; Prof. HUHN, Katrin 5 1 MARUM, University of Bremen, Germany 2 Istituto di Geoscienze e Georisorse, CNR-UOS di Padova, Italy. creep is a slow process where as mud flow is a sudden and fast process. creep doesn't cause any disaster where as mud flow is disastrous.
Advancing Culture of Living with Landslides Improvement of Fukuzono’s Model for Time Prediction of an Onset of a Rainfall-Induced Landslide. Pages Advancing Culture of Living with Landslides Book Subtitle Volume 3 Advances in Landslide Technology Editors.
Findings from flume experiments were used to develop a hydro-mechanical model for debris flow initiation, including rainfall thresholds. Other modeling investigations included in this special issue examined the role of exfiltration from bedrock fractures on slope failure [ 18 ] and the influence of variable bedrock topography coupled with.
Summary. Two-volume set, includes a free CD containing the full contents of the book. Landslides and Engineered Slopes: Protecting Society through Improved Understanding comprises the Proceedings of the 11th International Symposium on Landslides and 2nd North American Symposium on Landslides (Banff, Alberta, Canada, June ).
Included are thirteen keynote and invited papers, the. More recently, a study by Page et al. () of the km 2 Waipaoa catchment in the North Island of New Zealand showed that in the three-day Cyclone Bola rainfall event landslides provided 64% of the sediment load at the mouth of the basin.
Over the long term, they estimate that landslides would contribute only 10–19% of total yield. The main contributing processes are listed as gully.
This volume contains peer-reviewed papers from the Fourth World Landslide Forum organized by the International Consortium on Landslides (ICL), the Global Promotion Committee of the International Programme on Landslides (IPL), University of Ljubljana (UL) and Geological Survey of Slovenia in Ljubljana, Slovenia from May 29 to June 2, AbstractThe characteristics and hysteresis of seepage are critical for assessing the stability of creeping soil landslides after reservoir impoundment.
First, field and laboratory tests were conducted to obtain the saturated permeability coefficient of soil landslides within the Three Gorges Reservoir area and trends among these results were obtained through basic statistics.Rainfall thresholds for slope failures are essential information for establishing early-warning systems and for disaster risk reduction.
Studies on the thresholds for rainfall-induced landslides of different scales have been undertaken in recent decades. This study attempts to establish a warning threshold for large-scale landslides (LSLs), which are defined as landslides with a disturbed area.