Browsing by Author "Van der Merwe, J. H."

Now showing 1 - 3 of 3
  • Thumbnail Image
    Item
    Aircraft noise management through controlled-area demarcation in South Africa : its application at Cape Town International airport
    (Academy of Science for South Africa, 2005) Van der Merwe, J. H.; Von Holdt, D. S.
    Aircraft noise is a growing social, technical, economic and environmental problem, especially in developing countries like South Africa. It arises from the growth in air traffic, urbanization, uncoordinated planning around airports, and open-window living that makes physical insulation an ineffective mitigating solution. Cape Town International airport is a typical South African example of the phenomenon. Air traffic volume is steadily increasing and an additional runway has been proposed for the airport's efficient operation. The changing noise pattern requires the demarcation of a 'noise-controlled area' around the airport as the planning framework that is legally prescribed to manage this type of environmental nuisance. This paper reports the application of geographic Information system (GIS) technology to define a control zone using various spatial demarcation techniques. Each alternative zone has different spatial characteristics that define and incorporate the adjacent residential communities affected as well as vulnerable land in the vicinity. An aircraft noise generation model was used to map noise intensity contours. Different spatial noise footprints for six optional demarcation criteria were used to identify affected areas around the airport. The GIS methods were then compared and evaluated to select the optimum planning approach under South African conditions.
  • Thumbnail Image
    Item
    Military environmental literacy in the South African Army
    (Stellenbosch University, Faculty of Military Science (Military Academy), 2018) Smit, H. A. P.; Van der Merwe, J. H.
    Traditional military activities, such as fighting wars, are inherently destructive. Modern militaries undertake a diverse range of military activities, use large areas for military training and operational purposes, and are confronted with a global focus on environmentally responsible behaviour. These conditions compel militaries to ensure that soldiers display the correct attitude toward, behaviour in and knowledge about the diverse physical, social and cultural environments they occupy and on which they have an effect. Globally, and in South Africa, this is not only a moral obligation but a legal imperative too. The aim of this article is to report on the military environmental literacy (MEL) (attitude, behaviour and knowledge regarding the environment in which the military operate) of the members of the South African Army (SA Army). To achieve this aim, existing environmental questionnaires were evaluated to ascertain their suitability for use in an SA Army context. None of them was usable to appraise MEL in a SA Army context effectively. Consequently, an iterative process was initiated to develop a tailor-made, valid, reliable and organisation-specific questionnaire to assess MEL in the SA Army.
  • Thumbnail Image
    Item
    Solid waste management in developing urban areas : case study of Lwandle Township
    (Stellenbosch : University of Stellenbosch, 2004-04) Puling, Leloko; Van der Merwe, J. H.; University of Stellenbosch. Faculty of Arts and Social Sciences. Dept. of Geography and Environmental Studies; Jacobs, Ivan
    ENGLISH ABSTRACT: The subject of waste management is one that evokes a variety of debates due to the overwhelming implications on the environment and on health that are associated with the management of waste. In developing urban areas associated with informal settlements, environmental problems emanating from household solid waste management predicaments such as illegal dumping, littering and overfilling of skips have become a permanent feature. This is also the case in Lwandle a developing township in Helderberg Municipality, Western Cape. This study looks into the waste management system in Lwandle with the aim to investigate institutional settings, related socio-economic factors and resultant community perceptions, and avenues for the use of environmental education and community participation. The results show waste collection to be the responsibility of the Helderberg Municipality, but the collection operation is undertaken by a private contractor. The nature of waste collection under these arrangements is mainly determined by the nature of housing and associated accessibility. Consequently, three main methods of waste collection are used: kerbside collection; communal collection where there is use of bins and communal collection where there is use of skips. These have varying efficiency among the nine housing areas. Socioeconomic conditions, which were marked by a high level of unemployment and low incomes, determine societal attitudes. These underpin finer variations and detailed conditions of waste collection. These, in tum, establish the framework for suitable environmental education and community participation. The latter was found to be minimal. Thus, a holistic approach to the improvement of waste management that first acknowledges inherent broader societal problems such as housing and unemployment is proposed as part of the recommendations. This approach then concentrates on finer aspects such as contracts for waste collection, aspects of waste collection dependent on waste stream nature of housing areas, appropriate environmental education and community participation.