Global ETD Search
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Showing 1 to 20 of 21 for “"Drought index"”.
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An Integrated Drought Index (IDI) Incorporating Physical and Social Aspects
… social variables that can be integrated into a drought index to predict areas susceptible to drought. Severe drought events are capable of causing millions of dollars in damage. The 1988 drought caused the United States approximately $40 billion in damage. Drought forecasting, modeling, and …
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Drought assessment and forecasting using a nonlinear aggregated drought index
This study developed an objective drought assessment tool through a Drought Index (DI), and then developed a drought forecasting tool using the developed DI to forecast future drought conditions. These tools can be used to assist water managers to assess droughts effectively and forecast future …
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Characterization of palmer drought index as a precursor for drought mitigation
Coping with droughts involves two phases. In the first phase drought susceptibility of a region should be assessed for developing proper additional sources of supply which will be exploited during the course of a drought. The second phase focuses on the issuance of drought warnings and exercising …
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A climatological study of the Keetch/Byram Drought Index and fire activity in the Hawaiian Islands
… and daily rainfall amounts, the Keetch and Byram Drought Index (KBDI) estimates the amount of soil moisture by tracking daily maximum temperatures and rainfall. For the first time, the climatological relationship between the KBDI and fire activity is examined using a number of different …
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Development of a Remote Sensing-Based Agriculture Monitoring Drought Index and Its Application Over Semi-Arid Region
Agricultural drought is a natural disaster that usually occurs when the available water content goes below the optimal needs of the proper growth of plants during its growing season. It has enormous impacts on economic, environmental, and social sectors. In this study, our overall objective was to …
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Crop Water Deficits and their Season-ahead Climate Determinants Across the United States
… Unreliable access to water and the potential for drought result in major economic losses to the sector as well as potentially significant environmental damage. It is thus necessary to mitigate the effects of drought as well as to develop agricultural practices that include preparedness strategies …
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The development and application of a technique in dendrochronology
… correlation of key-year patterns with the Palmer Drought Index, to the occurrence of forest insect outbreaks, and to forest fires. The results showed a correlation in each case.
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Impact of drought on grape yields in the Western Cape, South Africa
Droughts remain a threat to grape yields in South Africa. Previous studies on the impact of climate variability on grape yield in South Africa have focussed on either the rainfall or the impact of temperature on the grape yields; meanwhile, the grape yields may be more influenced by impacts of …
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Simulating the characteristics of droughts in Southern Africa
Drought is widely considered as one of the most devastating natural disasters in the world. In particular, drought is a big threat in Southern Africa because the economy of most of the population in the region is based on rain-fed agriculture. Previous studies have projected that global warming may …
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Landsat Evaluation Of Trumpeter Swan Historical Nesting Sites In Yellowstone National Park
… and Normalized Difference Vegetation Index (NDVI) and compared to field conditions. Swan nesting records were analyzed in comparison to drought index and human visitation rates to determine if these factors may contribute to the decline of trumpeter swans nesting in YNP.</p> …
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Synoptic-Scale Atmospheric Conditions Associated with Flash Drought Initiation in Puerto Rico and the Caribbean
While conventional drought has been studied for many years, new research focuses on different aspects and types of drought. Flash Drought is a relatively new area of research in drought literature, dating back to the last ten to twenty years in the United States. Flash drought in the Caribbean has …
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Evaluation of future meteorological and hydrological drought in the Rufiji basin
… the critical need to understand the dynamics of drought patterns in the Rufiji Basin, Tanzania, under both current and future climatic scenarios. Droughts, with their profound impact on the socio-economic fabric and environmental sustainability of the region, represent a significant challenge in …
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Assessment of the effect of climate change in anticipated water resources availability in arid climate zones
Climate change impact and drought phenomena linked with anthropogenic pressure have become a growing concern for water resource managers and policy makers, particularly in arid and semi-arid regions. This research proposes generic methodologies to evaluate the prospective impact of such changes at …
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Off road vehicle soil suitability analysis within the Kisatchie National Forest
… soil trafficability ratings, Keetch-Byram Drought Index (KBDI), and infiltration parameters. Various GIS techniques, spatial statistics program, and mathematical models were employed. The spatial variability of KNF soils was determined using the choropleth and summarize zones techniques …
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Soil Moisture-driven Drought Evaluation under Present and Future Conditions
Drought is one of the most severe natural disasters and detrimentally impacts water resources, agricultural production, the environment, and the economy. Climate change is expected to influence the frequency and severity of extreme droughts. This dissertation evaluates drought conditions using a …
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Methodology for development of drought Severity-Duration-Frequency (SDF) Curves
Drought monitoring and early warning are essential elements impacting drought sensitive sectors such as primary production, industrial and consumptive water users. A quantitative estimate of the probability of occurrence and the anticipated severity of drought is crucial for the development of …
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Hydrological Drought Analysis for Seven North Georgia Watersheds (1970-2000)
<p>Drought is a prolonged reduction in precipitation which may result in significant effects on local ecosystems, watersheds, and water sources, with the potential to have negative impacts on human populations. Normalized indexes can be used to characterize drought magnitudes and frequencies using …
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Climate finance instruments and Kenyan agriculture
… include increased frequency of flooding and drought. These lead to loss of soil and crucial soil nutrients which affects agricultural production leading to food insecurity, increased poverty, and may have a significant impact on the quality of life. The majority of Africa’s population are …
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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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Drought in Southern Africa: structure, characteristics and impacts
Drought is a complex, slow onset phenomenon which is a recurring and inevitable feature of the regional climate of southern Africa. This thesis focuses on the structure and characteristics of meteorological droughts in southern Africa and their impacts on surface soil moisture, agricultural yields …
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