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risk analysis of slope instability of levees under river sand

Monitoring Slope Movements (U.S. National Park Service)

indicators of heightened potential for slope movement can be assessed by evaluating the following conditions within a region: seismic activity, intensity and duration of precipitation, climatic conditions affecting freeze-thaw, wind velocity, fire severity and frequency, annual groundwater level variations, stream and river erosion, and park .

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1 result in SearchWorks catalog - Stanford University

A Simplified Coupled Soil-Pore Water Pressure Generation for Use in Site Response Analysis; A Slope Stability Case Study by Limit Equilibrium and Finite Element Methods; Rational Analysis of Slope Stabilization with Piers and Determination of Unfactored Pier Load; Stability Analysis for a Landfill Experiencing Elevated Temperatures

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Numerical Modelling of Flood Induced Seepage Under Levees - DergiPark

Slope of levee outline is choosen as equal slope of water surface during flood. Phreatic line of filling determines the size of levee. The flood protection project of Filyos River included the construction of a total 7 km of levee, and these levees are 3.5 km long along the right and left shore. Distance between two levees is

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Inspections Reveal Problems with Iowa's Flood-Control Levees But ...

DEPENDABLE LEVEES VITAL IN FLOOD-PRONE IOWA. Levees are supposed to help manage flood risk. Yet, they scored a overall D- in the American Society of Civil Engineers' 2013 national report card on America's infrastructure. The Corps oversees about 10 percent of the nation's levees, with 2,500 in its levee safety program, according to the National Committee on Levee Safety.

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RIVER VALLEY AREA REDEVELOPMENT PLAN - University of Lethbridge

Province of Alberta has placed under legislative protection through Order-in-Council 1371/77, as amended from time to time. (35) "River Valley" means the natural channel/s which has/have been formed by a river and its tributaries. This encompasses the river banks or coulees, river terraces of flat alluvial

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Landslides and Engineered Slopes. From the Past to the Future, Two ...

Numerical analysis of slope stability influenced by varying water conditions in the reservoir area of the Three Gorges China. 803: ... Analysis method for slope stability under rainfall action. 1507: Hydrological modelling of the Vallcebre landslide. ... Simplified risk analysis chart to prevent failure of highway embankment on soft Bangkok clays.

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ON LEVEES - geotecnica.unipi

levees run for many km) High level of detail required. DESIGN OF THE GEOTECHNICAL CAMPAIGN. CRITERIA FOR A . COST-EFFECTIVE INVESTIGATION. PLENTIFUL RAINFALL & SNOW MELTING. Two subsequent flood waves. 3 LEVEE FAILURES. Serchio River Flood event in 2009 (Lucca & Pisa Districts - Northern Tuscany, Italy) Considerable expertise & flexible budgets ...

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6 Implementing Flood Risk Management Strategies | Levees and the ...

This condition occurred in 2011 during spring floods on the Missouri River (USACE, 2012b). Under exceptional circumstances, dams can fail and send significant quantities of water downstream, resulting in damage or destruction of levees and communities below the dams. ... and F. Amini. 2012. Slope stability analysis of earthen levee strengthened ...

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Sand Mining: Environmental Impacts and Selected Case Studies

Risk analysis of slope instability of levees under river sand mining conditions Zhuowen Wang, Jiyong Ding, Gao-sheng Yang Geology 2012 Abstract Levees are affected by over-exploitation of river sand and river adjustments after the formation of sand pits. The slope stability is seriously threatened, drawing wide concern among experts.

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Missouri University of Science and Technology Scholars' Mine

critical levees of high flooding risk for urban areas. The three levee cross-sections that were analyzed in this study are representative of the Stockton area (Levee A), the West Sacramento area (Levee B) and the Marysville (Yuba) area (Levee C). These three locations are among the sites currently under study as part of the Urban Levee Project ...

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evaluation of the stability of Quercus lobata and Populus fremontii on ...

An evaluation of the stability of Quercus lobata and Populus fremontii on river levees assessed using static winching tests Chris J. Peterson, ... Management of the risk of tree failure on levees can be guided by several of these inferences, e.g. that risk of tree failure is unlikely to increase as a result of modest amounts of precipitation if ...

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TABLE OF CONTENTS - usbr.gov

Flood frequency is an important factor in the risk from overtopping and dam failure. The procedures for determining the frequency is in "chapter B-1, Hydrologic Hazard Analysis." Items that may influence the frequency are spillway discharge capacity, debris blockage, and spillway and gate configuration.

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Quiz 7 Flashcards | Quizlet

- levees raise river above floodplain, exacerbating floods. potential for economic catastrophe: river avulsion - over time, river slope decreases by building delta seaward, leading to deposition and backfilling of river channel - eventually, during flood, river breaks through natural levees to take a steeper, shorter path to sea (RIVER AVULSION ...

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(PDF) Levee breaches and "geotechnical uncertainty" in flood risk ...

Levee breaches and "geotechnical uncertainty" in flood risk mapping. Baldassare Bacchi. Stefano Barontini. Roberto Ranzi. michele Ferri. Maurizio Mazzoleni.

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NHESS - Slope stability and rockfall assessment of volcanic tuffs using ...

While the current paper deals with a low-strength pyroclastic rock, it has a slightly different approach to cliff stability analysis. In this study, slope stability is assessed by using a combination of remote sensing techniques, field measurements and laboratory testing of tuffs with 2-D FEM (finite element method) analyses of slopes.

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Enriching flood risk analyses with distributions of soil mechanical ...

probabilistic description of soil mechanical parameters. The ideas are based on the application to newly built river levees, and therefore a known related relative den- sity (here: ID= 0.5) is assumed. Additionally, influences such as the spatial variability, natural water content and loading history are not considered. This assumption and

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Landslide and Slope Stability | PDF | Landslide | Dam - Scribd

Slope Stability Need for Earth Retaining Structures and Flooding Protection Discussion of Factors Influencing Design References and Bibliography Landslides The Mamayes, Puerto Rico, landslide, 1985. This landslide destroyed 120 houses and killed at least 129 people, the greatest number of casualties from any single landslide in North America.

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Geologists and Geotechnical engineers provide flood risk management

Under the Continuing Authorities Program, the Corps is working with the city of Arcadia to design and construct a system of levees and floodwalls that will provide flood protection to the city. The project is estimated at approximately $37 million and is currently in the design phase.

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Safety of coastal defences and flood risk analysis

Safety of coastal defences and flood risk analysis C.V. Mai1,2, P.H.A.J.M. van Gelder1 & J.K.Vrijling1 1 Delft University ... instability of dike's slope damage of erosion of inner slopes dike crest overtopping outer slopes inner slopes instability of instability of piping rupturing sand flow outer slopes armour layer damage of armour layer ...

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Application of UAV Remote Sensing Technology for Sand Quarry Volumetric ...

Oct 13, 2020The excavation of sand in the riverbed is essential because it helps to maintain the river path and avoid flood inundation during the rainy season. But the excess sand removal only creates a negative impact to the surrounding environment. Hence, effective monitoring and scientific audit method are required to identify the illicit sand quarry.

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Table of Contents: Geosustainability and geohazard mitigation - Villanova

Risk Based Design of Levee System The Development Timeline Framework: A Tool for Engendering Sustainable Use of Underground Space Embodied Energy as an Environmental Impact Indicator for Basement Wall Construction Life Cycle Impacts for Concrete Retaining Walls vs. Bioengineered Slopes Soil-Bioengineering for Slope Stabilization in Ohio

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Failure paths for levees - International Society for Soil Mechanics and ...

For instance, a slope instability may occur, but if there is enough residual strength in the levee, additional mechanisms need to develop before flooding occurs. Failure paths allow for the consideration of this additional strength in the analyses of the levee.

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Appendix G Coordination and Environmental Analysis - United States Army

The DuPage River Flood Risk Management study resulted in two types of flood control measures, a levee and a series of non-structural measures for up to 42 structures in multiple municipalities ....

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Oregon.gov : State of Oregon

Advanced Course on Soil Slope Stability - Vol. 1 Advanced Course on Soil Slope Stability - Vol. 2 Slope Stability in Road Construction Columbia County Stormwater and Erosion Control Ordinance The Design of Enchroachments of Flood Plains Using Risk Analysis - April - 1981 8C - 3282(6)

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Appendix B. Slope Stability Analysis - Coastal Protection And ...

the following stability analysis cases were evaluated for the conveyance channel cross-sections: case 1- water level in the channel at elevation +10 feet and water level landside of the guide levee taken as corresponding to typical low groundwater level, which ranges from about elevation -3.5 feet at station 55+00 to elevation -6.8 feet at .

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Study on Mechanism of Bank Failure in the Alluvial River

The main findings are as follows: (1) through in-depth analysis of the actual characteristics of the bank collapse test model to simulate the phenomenon and the process of collapse of the bank collapse, combined with the actual data and test results of the bank collapse, this paper proposes a new bank collapse classification and analysis mode.

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Best Practices in Dam and Levee Safety Risk Analysis - ECNA

• unsw (foster et al., 1998, 2000) looked at historical frequencies of failures and accidents in embankments of large dams constructed from 1800 to 1986: - 47% of failures due to internal erosion - 48% of failures due to flood overtopping or appurtenant structure failures - 4% of failures due to static slope stability - 2% of failures due to .

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Dynamic risk assessment of slope stability of homogeneous earth-rock ...

This study realizes the dynamic risk assessment of dam slope stability under multiple hazards, avoids the limitation of evaluating the dam slope stability with a single safety factor, and provides a reference for risk analysis and emergency management of reservoir dams under the action of multiple hazards. ... (Rhne River, Switzerland). Sci ...

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Reliability of Flood Defences - TU Delft

The probability of failure (reliability) of flood defences is mainly determined by their height and geotechnical stability. Backward erosion piping or under-seepage is a major cause of levee failures and a main contributor to the probability of failure of river levees due to the large (mostly geotechnical) uncertainties.

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A GIS-Enabled Approach for Assessing Damage Potential of Levee Systems ...

Flood protection levee systems are complex, interconnected systems, where failure at one location means failure of the entire system. Levees are formed through various geologic processes and human activities over time and information regarding soil properties is collected only at limited point locations and varies significantly both laterally and with depth. Prediction of levee performance in ...

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Risk analysis of slope instability of levees under river sand mining ...

The results indicated that the probability of instability risk rose from 2.38% to 4.74% as the pits came into being. Levees are affected by over-exploitation of river sand and river adjustments after the formation of sand pits.

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Project > Highwall stability assessment - Barr Engineering

When planar-type, wedge-type catchment and bench failures were found in a highwall at its Marinette Quarry, Specialty Granules LLC wanted to assess the highwall's stability, identify potential hazards, and garner recommendations to achieve a stable slope and bench configuration for future mining operations at its Kremlin facility.

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The environmental impacts of river sand mining - ScienceDirect

7 days agoThe main processes that are responsible for sediment delivery into the river can be identified in three categories: (1) mass wasting processes, (2) erosion of hillslopes by water and (3) erosion by rivers of their beds and banks Collins1990. 2.2. Sediment transport

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TABLE OF CONTENTS - usbr.gov

The levee safety process includes use of the Levee Screening Tool, or more detailed work as part of a Higher-Level Risk Assessment for a specific levee system. Engineering geologic input is needed in all of these analyses, but level of detail must be balanced according to scope, budget, and schedule.

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Review Plan - IES - United States Army

2) slope instability of the toe due to tailwater recharge of the foundation drainage blanket and inclined chimney drain. The primary consequence center is Wilkesboro, North Carolina, located approximately 6-7 river miles below the dam. Levees in the metropolitan area would be overtopped. Consequences are driven by the large

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Multiple failure modes-based practical calculation model on ...

The slope stability factor is defined as the ratio of the sliding resistance force to the sliding force, thus the safety factor of levee slope can be calculated by the following equation F_ {s} = frac { {M_ {r} }} { {M_ {s} }} (6) where M r is the resisting moment of slope, M s is the slip moment of slope.

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GeoCongress 2013 : stability and performance of slopes and embankments ...

A Cell-based Reliability Analysis Model for Predicting Regional Rainfall-induced Slope Failures Travel Distances of Earthquake-induced Landslides Stability Analysis of the L-575 Levee Failure on the Missouri River Probabilistic Back Analysis of Failed Slopes using Bayesian Techniques

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Slopes.docx - Running head: EFFECTS OF CLIMATE IMPACTS ON SLOPE ...

View Slopes.docx from ECON 1102 at Makerere University School of Law. Running head: EFFECTS OF CLIMATE IMPACTS ON SLOPE STABILITY OF LEVEES Effects of Climate Impacts on Slope Stability of Levees: A

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Upcoming Changes for EM 1110-2-1913 Di C i dE l i fDesign ... - USSD

Typical Sand Levee Cross Section 4:1 Riverside slope 10 foot crown 5:1 Land side slope Steeper slopes resulted in erosion due to through-seepage. 10 h base width (The width at the base of the levee is 10 time the height of the levee.) On heights greater than 10 feet a berm is required • 3 feet thick usually 20 feet wide.

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Risk analysis of slope instability of levees under river sand mining ...

This study analyzed the uncertainties of slope stability of levees under river sand mining conditions, including uncertainty caused by interestdriven over-exploitation by sand mining contractors, and uncertainty of the distance from the slope or sand pit to the bottom of the levee under the action of cross-flow force after the sand pit forms.

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