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 368 for “"droughts"”.
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European droughts under climate change: projections and uncertainties
Droughts are one of the most damaging natural hazards, and anthropogenic climate change has and will continue to alter their characteristics. Better understanding of changes in drought characteristics under potential future climates is vital for managing drought risks and impacts, yet projections …
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Simulating the characteristics of droughts in Southern Africa
… may enhance the frequency and intensity of droughts over Southern Africa in the future. However, the credibility of this projection depends on the ability of the global and regional climate models (GCMs and RCMs) in simulating the characteristics of drought. This thesis presents the …
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Managing impacts of hydrological droughts and heat waves on thermal power plants
… power plants and electricity grids. Recent droughts and heat waves have highlighted the tension between thermal power plants and water resources, stimulating various research efforts. Prior research work has largely focused on long term energy infrastructure choices to ameliorate the …
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The tropical Atlantic trade winds as related to droughts in northeastern Brazil
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Meteorology and Physical Oceanography, 1981.
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Probabilistic Models for Droughts: Applications in Trigger Identification, Predictor Selection and Index Development
… Monitor) provides a hard classification of droughts using various hydrologic variables. However, this method does not yield model uncertainty, and is very limited for forecasting upcoming droughts. The primary goal of this thesis is to develop and implement methods that incorporate …
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Potential impacts of climate change on hydrological droughts in the Limpopo river basin
Climate change possibly intensifies hydrological droughts and reduces water availability in river basins. Despite this, most research on climate change effects in southern Africa has focused exclusively on meteorological droughts. This thesis projects the potential effect of climate change on the …
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The response of southern African vegetation to droughts in past and future climates
… and Mapping Studies (GIMMS). Meteorological droughts were analyzed at different timescales (1- to 18-month timescales), using two drought indexes: the Standardized Precipitation Evapotranspiration Index (SPEI) and the Standardized Precipitation Index (SPI). The responses of vegetation to …
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Understanding the characteristics of droughts over Eastern Africa in past and future climates
… continue to enhance evaporation and intensify droughts at all scales, most drought projections over eastern Africa are based on rainfall alone and are limited to meteorological droughts. The present study combines rainfall and Potential Evapotranspiration (PET) to examine the characteristics of …
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Understanding the impacts of ENSO patterns on droughts over southern Africa using SPEEDY
… (ENSO) is a major driver of southern Africa droughts, but the nonlinearity of ENSO variation inhibits accurate prediction of droughts. While studies have identified multiple patterns of ENSO, most drought predictions over southern Africa are still based on only two ENSO patterns. This study …
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A Multi-Scale Study of the Nexus of U.S. Droughts: Predictability, Mechanisms, and Awareness
… spatiotemporal scales. Alarmingly, every year, droughts continue to cause billions of dollars in economic losses. To constrain these losses, there is a crucial need to further advance drought understanding and predictability, and effectively communicate its risks. This dissertation develops an …
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Investigating the link between southern African droughts and global atmospheric teleconnections using regional climate models
… Models (RCMs) in simulating the Southern African droughts. It uses the Standardized Precipitation-Evapotranspiration Index (SPEI, computed using rainfall and temperature data) to identify 3-month droughts over Southern Africa, and compares the observed and simulated drought patterns. The …
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Effects of droughts and animal diseases on smallholder farmers’ participation in the South African beef market
There is global recognition that climate variability and its impacts are affecting most aspects of our lives, and frequently. Climate variability includes aspects like rising global temperatures, changing rainfall patterns, and elevated carbon levels in the atmosphere. Some of the climate …
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A Comprehensive Review of Droughts in Texas and their Implications on Water Policy and Future Management Strategies
Prolonged and extreme droughts have plagued the Texas region for centuries. Texas has faced hydrological, agricultural, ecological, and economic impacts from three major drought events: the 1950s, the 2010s, and the current drought, which has caused significant damage across all sectors. Climate …
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The role of soil moisture conditions in the occurence of floods and droughts over the Mississippi basin
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1997.
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Susceptibility Of Headwater Catchment Hydrology To Persistent Droughts And Forest Structure Modification - A Plot To Catchment Scale Analysis
Headwater catchments across the Western United States are critical environments to natural ecosystems and are a vital component of water resources to many communities and industries and may be strongly affected by changing climate and altered disturbance regimes. To better quantify how these …
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The impact of dams, droughts, and tributary drainages on channel form and process : Rio Grande and Rio Chama, NM
A guiding principle in river science maintains that channel systems evolve to convey the sediment loads and water discharges imposed upon them. Changes in sediment and water inputs may result in adjustments to channel geometry, bed texture, and related parameters. Over the last century, geomorphic …
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Droughts and flooding rains: a fine-resolution reconstruction of climatic variability in Western Victoria, Australia, over the last 1500 years.
The purpose of this study was to reconstruct climatic change of the last two millennia in western Victoria using fossil diatoms as the primary proxy. Due to their short life span and sensitivity to changing water chemistry, diatoms are ideal for reconstructing short term changes in suitable …
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Loss and damage from droughts: material and non-material impacts of water scarcity on women farmers in Gugulethu, Cape Town
… for adapting to the possibility of future droughts. The vulnerability of these women farmers in low-income areas need to be addressed at their roots. These emerging conceptual openings emphasise the importance of exploring lived-experiences of L&D to better reduce the risk of L&D in …
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Development and analysis of a homogeneous long-term precipitation network (1850-2015) and assessment of historic droughts for the island of Ireland
… to the socio-economic impacts of historic droughts. During the years 1850-2015 seven major drought rich periods with an island wide fingerprint are identified in 1854-1860, 1884-1896, 1904-1912, 1921-1924, 1932-1935, 1952-1954 and 1969-1977. These events exhibit substantial diversity in …
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