Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 37 for “"overtopping"”.
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Overtopping of coastal structures caused by irregular waves
… investigation into the average rate of overtopping caused by irregular waves. A literature review is given which describes the previous research done in the field of overtopping. This research included a number of model studies using both regular and irregular waves. The literature …
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Levee Breach by Overtopping: The Effects of Soil Properties
… as earthen embankments, these levees may fail by overtopping, when flood levels exceed design floods. Past studies have shown that soil properties play an important role in the breach development of an overtopped levee. An experimental study has been performed in the Hydraulics Laboratory, …
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Θραύση λιθορρίπτων φραγμάτων λόγω υπερχείλισης: [υπό] Νικολάου Κ. Σφακιανάκη
… OF THE EMBANKMENT OF A ROCKFILL DAM DUE TO OVERTOPPING. OVERTOPPING IS BROUGHT ABOUT BY ADDING AN INITIAL DISCHARGE TO THE DAM'S RESERVOIR. THE DISCHARGE VARIATION WITH TIME DOWNSTREAM IS OBTAINED FOR VARIOUS VALUES OF THE INITIAL DISCHARGE. A MATHEMATICAL MODEL IS PROPOSED FOR THE PROGNOSIS …
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Evaluation of the Mechanical Strength of Bund Walls under the Catastrophic Failure of Storage Tanks via Fluid Structure Interaction
… dynamic pressures exerted on the bund wall, the overtopping fractions of the material representing the ratio of the quantity of fluid that escapes the bunded area to the quantity of fluid that was initially in the tank, and mitigation measures to reduce the incurred losses. These previous studies …
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A Comparison Of Installation Methods And Maintenance Practices Of Protected Side Armoring
… withstand higher than designed water levels and overtopping without breaching" (USACE, 2007). In the analysis of armoring products, two criterions usually govern. First, the ability for the armoring to resist overtopping velocity from storms greater than the 100 year authorized level. Second, …
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Improvements of MPM and Its Applications in Modelling Rapid Soil/Water Movements
… such as seepage flows through embankments, overtopping induced dam failures and the erosion of riverbanks and coastal areas. Since numerical simulations are significantly less costly tools than physical experiments even on a small scale, the past decades have witnessed the dramatic …
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Wind-Driven Sea Surface Wave and Coastal Water Level Dynamics Across Different Spatial Scales
… the combined surface wave and water level overtopping potential and intertidal reduction under future sea level rise scenarios. A series of high resolution, small-scale laboratory experiments are run to investigate the relationship between wave runup-driven infiltration into the subsurface …
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Physical Modelling of Tailings Dam Breach
… Current breach models for the failure mode of overtopping, used to inform flood routing and emergency preparedness plans, have been developed for water storage dams and have not been calibrated to the tailings dam case. This thesis presents the results of eleven 1m high homogeneous fine sand …
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Risk Assessment of Post-Fire Floods on Dams and Their Floodplains
… and reduced vegetation could result in overtopping failure of an earth dam (dam-break scenario), and the accumulation of sediment and debris flow could reduce the capacity of the reservoir (no-dam break scenario). In this study, a framework to evaluate the impacts of post-fire floods on …
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Combined abutment and contraction scour in compound channels for extreme flood events
… experiments under submerged orifice and overtopping flows were carried out. To better understand the effect of vertical contraction on abutment scour, free surface flows were also investigated for similar experimental conditions. The majority of the experiments were carried out in …
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Coastal Overwash: Processes and Modelling
… was shown to occur due to both wave runup overtopping the beach crest and surge levels exceeding the beach crest height. On the back barrier, overwash hydrodynamics and sediment transport were shown to be affected by the back barrier water level, friction, infiltration, lateral spreading …
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Quantifying overwash flux in barrier systems : an example from Martha’s Vineyard, Massachusetts, USA
… centennial scales, barriers are maintained via overtopping during storms, causing deposition of washover fans on their landward sides. This study examines three washover fans on the south shore of Martha’s Vineyard using a suite of data including vibracores, ground penetrating radar, high …
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Quantifying overwash flux in barrier systems : an example from Martha's Vineyard, Massachusetts, USA
… centennial scales, barriers are maintained via overtopping during storms, causing deposition of washover fans on their landward sides. This study examines three washover fans on the south shore of Martha's Vineyard using a suite of data including vibracores, ground penetrating radar, high …
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Evaluation of Analysis Methods used for the Assessment of I-walls Stability
… system suffered 46 breaches due to water levels overtopping and another four caused by instability due to soil foundation failure. The Interagency Performance Evaluation Task Force (IPET) conducted a study to analyze what happened on the I-wall breach of the various New Orleans flood control …
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Micro-modelling of wave fields
… marinas, 2. develop a new composite seawall for overtopping based wave energy conversion and 3. test geometry variations in an existed yacht harbour. The obtained experimental findings demonstrated that the micro-modelling of non-breaking waves is possible for water depths larger than 0.03m and …
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NUMERICALLY MODELING FLOODING SUSCEPTIBILITY OF THE UNITED STATES NAVAL ACADEMY
… periods of rainfall, storm surge, or river overtopping, these issues pose as a hazard to human life as well as a source of damage to urban infrastructure. The United States Naval Academy is one location that is especially impacted by urban flooding. Due to glacial isostatic adjustment and …
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The underscour of rubble mound breakwaters by wave action
… backfills, settlement of the main structure and overtopping of the subsequent waves will follow eventually. Two-dimensional model experiments have been conducted in order to clarify the basic characteristics of sand scour under dolos-protected rubble mound breakwaters, and to investigate some …
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