Browsing Natural and Agricultural Sciences by Supervisor "Rautenbach, C.J. de W. (Cornelis Johannes de Wet)"
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Browsing Natural and Agricultural Sciences by Supervisor "Rautenbach, C.J. de W. (Cornelis Johannes de Wet)"
Now showing items 1-20 of 21
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(University of Pretoria, 2007-10-12)Open file dissertation.pdf to read abstract
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(University of Pretoria, 2009-11-05)The Vaal Triangle is renowned for its highly industrialised activities. With the addition of domestic fuel burning, vehicle exhaust, mining and agricultural activities, the Vaal Airshed has become highly polluted. The ...
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(University of Pretoria, 2007-02-10)The climate of the eastern section of the Sahelian latitude, especially over the Eritrean subdomain, is often associated with long drought episodes from which the atmospheric mechanisms are poorly understood. In an effort ...
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(University of Pretoria, 2013)Positive lightning flashes are known to be more intense and cause more damage than negative flashes, although positive flashes only occur about 10% of the time. This study expounds on cloud microphysical aspects of ...
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(University of Pretoria, 2013)Cut-Off Lows (COLs) are certainly amongst the most important synoptic-scale rain producing weather systems in South Africa. Rainfall associated with COLs is usually widespread, while about 20% of COLs are associated with ...
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(University of Pretoria, 2013)Mariepskop (direct translation: “Marieps hill”) forms part of the northernmost edge of the Drakensberg Mountain range in the east of South Africa, and is known for its complex topography associated with meso-scale atmospheric ...
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(University of Pretoria, 2006-01-18)The South African Weather Service (SAWS) was offered a unique opportunity to become involved in the prestigious global Baseline Surface Radiation Network (BSRN) project in 1995. This study is an academical and technical ...
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(University of Pretoria, 2006-04-07)Please read the abstract in the section 00front of this document
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(University of Pretoria, 2015)Water is a scarce and precious natural resource in South Africa. The Department of Water and Sanitation (DWS) has been appointed as the custodians of the water in South Africa with Catchment Management Agencies (CMA’s) ...
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(University of Pretoria, 2006-10-10)Empirical techniques are developed to adjust dynamic model forecasts on the seasonal time scale for southern African summer rainfall. The techniques, called perfect prognosis and model output statistics (MOS), are utilized ...
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(University of Pretoria, 2013-06-28)While it has become the United Nations (UN) responsibility to peacekeep the world’s most conflict ridden countries, so too has their impact on the physical environment increased. Large numbers of personnel require equally ...
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(University of Pretoria, 2015)The development of the Severe Weather Impact Forecasting System (SWIFS) for flash flood hazards in South Africa is described in this thesis. Impact forecasting addresses the need to move from forecasting weather conditions ...
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(University of Pretoria, 2015)The South African wind energy sector is developing rapidly with numerous wind energy facilities currently being commissioned. According to the Intergovernmental Panel on Climate Change (IPCC), some risks and opportunities ...
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(University of Pretoria, 2012-09-14)Atmospheric aerosols are suspensions of solid and/or liquid particles in the air from natural and anthropogenic sources. Aerosols are ubiquitous in the air and are often observable as dust, smoke and haze. Dust is considered ...
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(University of Pretoria, 2015)This thesis is an expansion on preliminary methodological systematics to a multi-disciplinary identification of cosmology in sub-Saharan Africa. The work also draws causal relationships to an explanatory level through ...
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(University of Pretoria, 2006-12-08)The thesis reports on the development of a new quasi-elastic nonhydrostatic model, cast in a terrain-following coordinate based on the full pressure field. The equations used are the ċ coordinate by White (1989). The ...
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(University of Pretoria, 2009-04-16)Statistical post-processing techniques are used to remove systematic biases in modeled data. Models have shortcomings in the physical parameterization of weather events and have the inability to handle sub-grid phenomena ...
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(University of Pretoria, 2011)Biomass burning in southern Africa has brought significant challenges to the research society as a fundamental driver of climate and land cover changes. Burned area mapping approaches have been developed that generate ...
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(University of Pretoria, 2013)In 2006 a Numerical Weather Prediction (NWP) model known as the Unified Model (UM) from the United Kingdom Meteorological Office (UK Met Office) was installed at the South African Weather Service (SAWS). Since then it ...
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(University of Pretoria, 2009-09-15)Numerical Weather Predictions (NWPs) are subject to systematic errors and biases. Hence, the continuous verification of NWP model outputs in order to contribute to model improvement became very important over recent years. ...
Now showing items 1-20 of 21