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 138 for “"flood events"”.
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Combined abutment and contraction scour in compound channels for extreme flood events
… scour mechanisms and scour patterns for extreme floods. Close-toreality scour events were physically simulated using models built at 1:45 and 1:30 geometric scales of two-lane bridge prototypes. Scour and flow-measurement experiments under submerged orifice and overtopping flows were carried out. …
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An analysis of transportation asset damage and repair costs after inland flood events
Flood events bring havoc to transportation assets including bridges, culverts, and roadways on an annual basis. This has been an increasing trend in the recent years, especially in midwestern states. Millions of dollars are spent to repair or replace transportation infrastructure every year due to …
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Spatiotemporal Dynamics and Climate-Driven Risk of Compound Flood Events in the Great Lakes Basin
Floods are among the most frequent and economically significant natural hazards affecting communities worldwide. Understanding their mechanisms, spatiotemporal patterns and projected changes is crucial to develop effective strategies for risk mitigation. This study analyzes three types of …
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The Seasonality and Climate Predictability of the Frequency of Extreme Flood Events Across the Contiguous United States
… the seasonality of the frequency of extreme flood events across the United States (US) and outlines the impact of large-scale climate on its spatio-temporal variability. The analysis was conducted on 317 stream gages from the United States Geological Survey (USGS) Hydro-Climatic Data Network …
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Monitoring and measuring the impacts and environmental implications of flood events on contaminated sediment dispersal in the River Swale catchment, North Yorkshire
… the sediments of rivers and in their surrounding floodplains. This thesis investigates the mobilisation, transport and the overbank deposition of sediment-associated heavy metals during flood events on the River Swale, North Yorkshire. This catchment has a prolonged history of mining for lead and …
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Attribution of the risk of extreme flood events to climate change in the context of changing land use and cover: case study of the shire river basin flood of 2015
The 2015 flood event in the Shire River basin was characterised by Malawi Government’s Department of Disaster Management (DoDMA) as the worst on record. It led to the damage in property worth millions of dollars with recovery still ongoing 3 years later. Over 150 fatalities were confirmed at the …
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Exploring Overbank Sediment Deposition Variation in Heavily Modified Floodplains of the Lower Mississippi River: A Sedimentological and Geophysical Analysis
… to the channel profile and surrounding floodplains through dams, dikes, revetments, dredging, and channel cutoffs. Although these changes have improved navigation and reduced flood risk, unanticipated changes to the major flood return period, individual flood severity and duration, and …
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An Analysis of Hydrological Model Uncertainty at the Local Stage of a Climate Change Impact Assessment in the Suir Catchment
… the changes in catchment hydrology and in future flood magnitude and frequency relationships due to climate change. Two lumped conceptual rainfall-runoff models of different degrees of complexity are forced with the output of three GCMs and two emissions scenarios (A2 and B2) downscaled to …
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Improving the economic evaluation of flood risk management studies
… for improving the economic evaluation of flood risk management (FRM) studies. The most common types of FRM infrastructure in the United States (U.S.) are dams and levees. The FRM infrastructure in the U.S. is aging with a large number of dams and levees now more than 50 years old and in …
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A quantitative analysis of the impact of land use changes on floods in the Manafwa River Basin
Flood events in the Manafwa watershed, located in eastern Uganda, have increased in frequency in recent years. The risk of flooding is increasing globally due partly to climate change which enhances the number of weather extremes like excessive rainfalls or droughts. This increase in flood events …
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Development of hydrograph-based approach to modeling fate and transport of sediment-borne bacteria in lowland rivers
… conditions from low flow without sediment to flood events carrying high concentrations of sediment. The development of this new approach is based on the following major works: 1) a hydrograph-based method for determining bed shear velocity and other flow parameters was developed and tested …
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The integration of nonstructural methods into flood loss reduction programs:an evaluation of a remaining obstacle
… the primary criterion. Recent criticism of the flood loss reduction planning is directed at the Corps. One criticism is that the traditional design practices of the Corps address only large flood events. The emphasis on large flood events precludes the use of nonstructural methods, whose …
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Riverine flood risk reduction in the Western Cape: a case study of the Baths River
Globally, floods are viewed as the most destructive of all naturally triggered disasters. This is indicated by reported flood losses that exceed one third of the estimated total cost associated with all disaster events triggered by natural hazards. Additionally, flood events account for two thirds …
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An Analysis of Key Aspects of Warm and Cool Season Flash Flooding in the Southern Appalachians
Flash flooding kills more people in the United States than any other severe weather phenomenon. One of the most vulnerable areas for flooding is the southern Appalachians. These mountains lie in a geographical location that places them near the Atlantic Ocean and the Gulf of Mexico, two major …
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The use of joint probability analysis to predict flood frequency in estuaries and tidal rivers
… in tidal rivers and estuaries. The estimation of flood risk may depend on extreme combinations of these variables rather than individual extreme events, but these relationships are complex and difficult to quantify. A probabilistic approach traditionally involves an assumption of independence …
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Understanding trans-basin floods in Germany : data, information and knowledge
Large Central European flood events of the past have demonstrated that flooding can affect several river basins at the same time leading to catastrophic economic and humanitarian losses that can stretch emergency resources beyond planned levels of service. For Germany, the spatial coherence of …
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Putting varieties of risk-based governance into institutional context: The case of flood management regimes in Germany and England in the 1990s and 2000s.
This thesis analyses how floods are managed in two European countries, focusing in particular on the role of risk instruments within emerging flood management regimes. Studying flood management is not only relevant because of a rise in frequency and severity of flood events in the 1990s and 2000s, …
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O crescimento urbano de Rio Claro e suas implicações nos riscos à inundação: cenários de 1970 a 2015
… the urban growth of the city of Rio Claro and flood areas through geotechnology and analyze the changes in risk areas in the period from 1970 to 2015. It is known that the intense urbanization that took place in the cities in recent decades resulted in sealed soil, removal of native vegetation, …
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Exploring Social Learning in Yorkton Following the 2010, 2014 and 2016 Floods
… learning has occurred in Yorkton following the flood events that the City experienced in 2010, 2014 and 2016. The study also aims to understand the factors that impacted social learning’s occurrence, its interrelation with the window of opportunity, and the outcomes that it produced. The data …
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Flood Processes in Semi-arid Streams: Sediment Transport, Flood Routing, and Groundwater - Surface Water Interactions
Flooding in semi-arid streams is highly variable but distinguished from its humid counterpart in terms of forcing conditions, landscape response, flood severity, and stream-aquifer connectivity. These floods have the potential for great benefit in a water-limited environment, but also great …
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