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 68 for “"Rainfall Patterns"”.
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Rainfall patterns in a small-scale watershed based on NexRad and ground-based datasets
… require a realistic representation of probable rainfall in its most sensible spatial-temporal dimensions matching that of the phenomenon under investigation. As one of the most critical inputs in environmental models, rainfall data can significantly change the quality and reliability of the …
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Integrated Modeling and Optimization of Stormwater Control Measures for Sustainable Watershed Management Under Urbanization and Changing Rainfall Patterns
Rapid urbanization and climate change (CC) are altering the natural hydrological cycle, contributing to more frequent and severe flooding. These changes are particularly pronounced in mixed urban–rural watersheds, where diverse land uses complicate hydrologic modeling and stormwater planning. To …
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Climatic trends and soil moisture feedbacks over Zimbabwe
… on an objective analysis of austral summer rainfall variability over Zimbabwe as well as characterization of rainfall patterns and frequency analysis over southern Africa region. A statistical analysis of historical trends in climate extreme events is used and lays a foundation of projecting …
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Regulation of reproductive success in the biennial plant, Hydrophyllum appendiculatum
… While some of this variance was probably due to rainfall patterns, seed production was negatively affected by an unidentified pathogen and a weevil that consumed flowers and developing seeds.
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The effect of altered rainfall seasonality on post-fire recovery of Fynbos and Renosterveld shrublands in the Cape Floristic Region
Shifting climate patterns are a cause for concern for natural ecosystems globally. Of particular concern is the effect of climate change on fire-prone, Mediterranean-type shrublands globally because of the heightened sensitivity of post-fire vegetation to environmental conditions. In this thesis, I …
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Optimizing and verifying an ensemble-based rainfall model
… verified the stochastic Recursive Cluster-point Rainfall model of Chatdarong (2006). A novel error metric allows comparison of the stochastic ensemble of rainfall image forecasts to a single observation (radar) image. The error metric forgives position errors and provides a flexible framework for …
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Changes in rainfall seasonality in the Western Cape, South Africa: an exploration of methods for determining the start and end of the rainfall season
… to detect and analyse changes in seasonality in rainfall for various groups of weather stations in the Western Cape area. Weather stations with similar seasonal patterns are firstly grouped together using certain clustering algorithms. The start and end of the rainfall season dates for the …
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Ecosystem responses to precipitation extremes
… strong interactions between variability in rainfall patterns within and among years. Variability in intra-annual rainfall patterns, and in particular large and more variable event sizes, acted to magnify the reductions in ecosystem functioning during drought. A systemic review of the …
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Extremes in events and dynamics : a nonlinear data analysis perspective on the past and present dynamics of the Indian summer monsoon
… in analysing short palaeo-climate records. Rainfall during the ISM over the Indian subcontinent occurs in form of enormously complex spatiotemporal patterns due to the underlying dynamics of atmospheric circulation and varying topography. I present a detailed analysis of summer monsoon …
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Unified Mathematical Modeling, Analysis and Simulation of COVID-19 and Ecological Processes
… factors such as temperature variations, seasonal rainfall patterns, and vegetation indices (NDVI) influence group sizes and social interactions over time. This ecological modeling employs similar mechanistic ODE-based frameworks, highlighting methodological consistency across biological systems.
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Low frequency variabilty of the Agulhas Current region in a numerical model
… (GMOC) and regionally it can influence rainfall patterns and severe weather events. The long-term variability of the Agulhas region was analysed in relation to temperature, sea surface height (SSH) and velocity within the current using output from a regional ocean model. Validation of …
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The Effect of Antecedent Dry Time on Water Quality Inflow and Outflow to Wet Ponds and Pollutant Removal Efficiency
… the COA, and potentially by areas with similar rainfall patterns, to construct wet pond should be revised.
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Developing a Multi-Band GNSS Remote Sensing Station To Measure Precipitable Water Vapor for Flash Flood Nowcasting
… steep terrain, narrow valleys, highly localized rainfall patterns, and limited measurement coverage. Traditional remote sensing methods, such as Doppler radar and microwave radiometry, suffer from reduced resolution at long range and signal blockage by mountains. GNSS-meteorology offers an …
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Large-scale conditions that result in wet summers over arid Western Southern Africa
The summer (November-April) rainfall patterns across the western region of southern Africa are poorly understood compared to the rest of southern Africa. Although the western interior of southern Africa is considered mostly arid, it is prone to highly variable rainfall and flash floods, impacting …
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Numerical modelling of the Angola Low and the Botswana High during a neutral and two El Ni˜no summers
… play a crucial role in the variability of summer rainfall over southern Africa. However, very little is known about their variability during the summer half of the year and how their influence on rainfall patterns during ENSO and non-ENSO summers may vary. In simple terms, a weaker Angola Low is …
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Measurement of Soil and Water-Quality Parameters to Understand Subsurface Transport Processes
… driven hydrological processes such as excess rainfall and/or draught cycles on saltwater intrusion processes with a focus on managing freshwater resources in island aquifers. As part of this effort, we used a combination of laboratory experiments and numerical simulations to study the impacts …
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The many forms of thirst : investigating forest constraints in the Cape Floristic Region
… likely to limit forest distribution than broader rainfall patterns. The biomes of the CFR were mapped using Mucina & Rutherford’s (2006) vegetation map. Environmental data was extracted from Schulze (2007) and analysed using various statistical methods and the effective rainfall during the wet …
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Impacts of inundation and season on greenhouse gas fluxes from a low-order floodplain
… variability is expected to alter temperature and rainfall patterns, which can impact the factors regulating natural generation of GHGs. With changing fluxes of GHGs, the natural feedback loops between GHG generation and climate may change. Increased emissions from natural sources would exacerbate …
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Análise da pluviosidade na microrregião de sapé e sua correlação com a produção da cana-de-açúcar: percepção dos agricultores no município de Sobrado/PB.
… reviewing the annual and seasonal variations in rainfall in Microrregion Sapé/PB, and verify the degree of relationship of annual precipitation with sugarcane production in the temporal segment from 1996 to 2012. The survey was developed based on the theoretical and methodological assumptions …
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