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.
Results
Showing 1 to 20 of 569 for “"floods"”.
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Modelling the propagation of subglacial floods
… determine the propagation speeds of subglacial floods and their impact on the overlying ice. In chapter 1 I discuss subglacial flooding in the broader context of subglacial drainage systems and review previous modelling approaches. In chapter 2 develop a model for flood propagation beneath …
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Mitigating floods : reconstructing Lives : rehabilitating Thatta
Pakistan was struck by floods in July 2010, the effects of which left 20.36 million people affected and 1.9 million homes damaged or destroyed'. In the province of Sindh in Pakistan, most of the affected population of the historic city of Thatta took refuge by fleeing to Makli Hill, a necropolis …
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Hydroclimate Drivers and Atmospheric Dynamics of Floods
… trends in the frequency and duration of global floods indicates that there is a significant upward trend in the statistics of their annual probability distribution, and large-scale climate teleconnections play a major role in modulating this trend. A comprehensive hydroclimate-informed framework …
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Coastal floods in view of sea level rise
… level rise induced intensification of coastal floods is a serious threat to many regions in proximity to the ocean. Although severe flood events are rare they can entail enormous damage costs, especially when built-up areas are inundated. Fortunately, the mean sea level advances slowly and …
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Defending networked resources against floods of unwelcome requests
The Internet is afflicted by "unwelcome requests'" defined broadly as spurious claims on scarce resources. For example, the CPU and other resources at a server are targets of denial-of-service (DOS) attacks. Another example is spam (i.e., unsolicited bulk email); here, the resource is human …
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Exploring the Hydroclimatology of Floods: From Detection to Attribution
Uncertainties in projected future flood risk and challenges of detecting signals of change from observations highlight the need to advance process understanding through linking hydrological extremes to large-scale climate drivers. In Ireland, recent years have highlighted vulnerability to flooding …
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Understanding trans-basin floods in Germany : data, information and knowledge
… processes and the role of trans-basin floods for a national risk assessment is largely unknown and analysis is limited by a lack of systematic data, information and knowledge on past events. This study investigates the frequency and intensity of trans-basin flood events in Germany. It …
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Floods in Germany : analyses of trends, seasonality and circulation patterns
… CPs during winter. Increasing trends in summer floods are found in the Rhine and Danube catchments, decreasing trends in the Elbe and Weser catchments. Finally, a significant trend towards a reduced diversity of CPs is found causing fewer patterns with longer persistence to dominate the weather …
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KNOWLEDGES, CONTROVERSIES AND FLOODS: national-scale flood management in Bangladesh
This research explores the views, beliefs and knowledges of experts responsible for flood management in Bangladesh. As one of the most disaster-prone nations on Earth, and in response to the neglect of power-holding experts within the existing literature, this project analyses the differences …
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A study of flash floods on a small drainage area
An investigation was made of the flash flood of July 9, 1943, on the Blacksburg watershed with a view toward an approximation of the actual amount of water passing as run-off during the storm, as well as the peak rate of flow. All the available data have been reviewed with the above purpose in …
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Modeling Flash Floods in Small Ungaged Watersheds using Embedded GIS
Effective prediction of localized flash flood regions for an approaching rainfall event requires an in-depth knowledge of the land surface and stream characteristics of the forecast area. Flash Flood Guidance (FFG) is currently formulated once or twice a day at the county level by River Forecast …
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Risk Assessment of Post-Fire Floods on Dams and Their Floodplains
… in evaluating the impacts of post-wildfire floods on civil infrastructures and residential zones. Earth dams are vulnerable to post-wildfire floods. The increased post-wildfire runoff volumes due to changes in soil characteristics and reduced vegetation could result in overtopping failure of …
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Application of dynamic optimization methods for foam floods in stratified reservoirs
Efficient recovery of oil from heavily stratified carbonate reservoirs can be very technically challenging, even when applying waterflood, gasflood, or WAG (water-alternating gas) processes. To date, relatively few field or pilot applications of foam flooding have been conducted due to an …
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Exploring Social Learning in Yorkton Following the 2010, 2014 and 2016 Floods
… a number of expensive upgrades. The subsequent floods contributed to keeping the window open. Furthermore, the data showed that social learning and the window of opportunity are interrelated. As a result of social learning and the policy window that opened after the flood, Yorkton is now more …
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Floods in the Niger River Basin in the face of global change
… increased. Despite the devastating impact of the floods on the population and the mainly agriculturally based economy of the riverine nations, awareness of the hazards in policy and science is still low. The urgency of this topic and the existing research deficits are the motivation for the …
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Floods, favors and fixes: the reproduction of vulnerability in Santa Fe, Argentina
… Fe, Argentina – a city with a long history of floods – to illustrate this point, this dissertation explores why people in the city remain vulnerable despite the government’s responses to risk. It is not that the city’s infrastructural solutions have failed to reduce risk. Rather, the solutions …
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NMR Studies of Enhanced Oil Recovery Core Floods and Core Analysis Protocols
… life of oilfield wells. Laboratory-scale core floods, in which one fluid displaces another from the pore space of a rock core, are widely used in petroleum research for oilfield evaluation and screening EOR processes. Achieving both macro- and pore-scale understandings of such fluid …
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Digital Rock: Understanding the mechanism of Enhanced Oil Recovery (EOR) Core Floods
Oil companies aim to increase their return on investment by extending the productive life of their existing oilfields. For that purpose, a better understanding of the physical phenomena which occur during waterflooding and enhanced oil recovery (EOR) is needed to optimise the oil recovery. In this …
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