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Showing 1 to 8 of 8 for “"rapid drawdown"”.
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Rapid Drawdown Analysis using the Finite Element Method
Rapid drawdown (RDD) occurs when the water level adjacent to a slope or embankment is lowered quickly after a long period of being elevated either at the normal operating level for a dam or in the case of levees, during a prolonged flood. The current state of practice for RDD analysis is a …
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Finite element analysis of embankment dam due to rapid drawdown events
… conditions associated with flood loading or rapid drawdown (RDD) conditions. The assessment of slope stability under RDD conditions is difficult to estimate due to the time-dependence of pore pressures within the dam and uncertainties in the shear strength properties of compacted fills. …
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Numerical Investigation into the effects of cavities on stability of slopes and seepage through earth dams under rapid drawdown condition
… of the presence of cavities in the subsoil and rapid-drawdown conditions. The current work aims to examine the influence of several parameters related to the cavity – such as the location (varying in X and Y directions), shape and diameter of the cavity, and the number of cavities – on the flow …
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The Investigation Of Okhissa Dam Using A Real-Time Monitoring System
… under conditions of steady state seepage and rapid drawdown. The results of steady state seepage analysis exceed the minimum design factor of safety of 1.5. The analysis for rapid drawdown is approximated due to insufficient knowledge of the behavior between the piezometric line and the …
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The relationship between slope stability and pore-water pressure in highly plastic clay in the Carrot River Basin
… with models of steady state groundwater flow, drawdown following flooding, and of induced pore-water pressure caused by construction. The flood hydrograph was represented as a total head versus time boundary condition for the transient groundwater seepage model. Factors of safety were …
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Identification, Mapping, Analysis, and Dating of Composite Mega Landslides in the Colorado Plateau
… other landslide dams likely played a role. The rapid drawdown conditions/pore pressure imbalances caused when the dams breached catastrophically, and their reservoirs drained likely served as a trigger. These landslides exhibit or created anomalous features not seen anywhere else in the region. …
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Mechanisms of strength loss in stiff clays
… The slide occurred at the end of a period of rapid drawdown of the reservoir. Although this was the longest and fastest drawdown in the life of the dam, 180 feet in 120 days, there had been seven previous cycles of drawdown, some nearly as severe as the one that preceded the slide. Field …
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Real-time monitoring of a multiple retrogressive landslide
… due to higher seasonal flows or alternately a rapid drawdown mechanism. On October 13, 2005, 25 days after installation of the IPIs, a major disturbance in the readings at both the crest and toe of the slope occurred. After this disturbance the crest was moving at greater rates than the toe. …