M.Sc. (Aquatic Health) / Urban impoundments play both a recreational and functional role in the urban areas. From the recreational point of view these impoundments offer aesthetically pleasing environs as well as habitat for aquatic organisms in a built environment. The functional role of impoundments is related to attenuation of storm water run-off that is released into urban water courses. Storm water run-off can have adverse effects on the ecological integrity of aquatic ecosystems. Water quality will influence other physical and biological components of these systems. It is for this reason that the ecological health of impoundments is assessed from an ecotoxicological perspective, focusing on Westdene and Emmarentia dams in Johannesburg. It has become common practice to use aquatic biota to assess the impacts of human activities on aquatic ecosystems. This is because animals and plants can provide a long-term integrated reflection of water quality, quantity, habitat quality and other environmental conditions. Water and sediment quality were assessed by applying standard techniques and protocols. Fish were utilized as bioindicator organisms in order to quantify the concentrations of metals available in the dam. Abundance of the macro invertebrate community was also measured. Physico-chemical water analyses were done during each sampling period to assess the water quality against the South African Water Quality Guidelines. Ammonia, which can be toxic to aquatic life, remained high in both dams. High phosphate concentration during the low rainfall season in Westdene Dam could result in eutrophication related problems. The microbiological analysis of the water suggests that the main cause of faecal and total coliforms contamination of the impoundments possibly originates from dominant birds, African Sacred Ibis (Threskiornis v aethiopicus) and Egyptian Goose (Alopochen aegyptiaca ) in the dam and others water birds frequenting the dams. Abnormally high concentrations of the heavy metals Nickel and Chromium were found in the water body and fish (Clarias gariepinus and Tilapia sparmanii ) thus indicating bioavailabity of these metals resulting in bioaccumulation in fish. High concentration of Lead in sediment was recorded and may greatly impact benthic macroinvertebrates population and their habitat.

No description available.

M.Tech. (Architectural Technology) / A persons' well-being is characterized as health, happiness, prosperity and as being in a good state of existence. The way in which we maintain our body, by eating the correct foods to exercising on a daily basis, is an important part of maintaining our well-being. Medical authorities regard South Africa a shaving one of the healthiest environments and climates in the world. South Africans get to enjoy sport and outdoor activities, fresh fruit and vegetable sand some of the planets cleanest air (Health issues in South Africa 2011: [sp]). This however is not the case for many South Africans living in poor overcrowded conditions with the lack of basic facilities. Within the medical field are large areas of controversy, particularly with HIV/ AIDS treatments between Traditional medicine and Bio-medicine. The dissertation will not focus on the study of one specific ailment and space related to health care. Instead an attempt is made to create a space where a multitude of medical functions can operate and share space in a symbiotic relationship. This would ultimately create a place of well-being and healing, where public health can be re-invent for a broader audience through mixed use facilities, social interaction and nature. The investigation area of the dissertation takes place in Yeoville and the function of the building will examine the notion of a Mixed Use Healthcare Centre. The architecture will look at the human scale and needs whilst Nature will deal with form and function. The Design intervention attempts to dissect the existing healthcare system and inject new and fresh responses to the ailing problems in the industry. There are currently large gaps in the public and private sectors of South Africa as well as the dialog between Traditional medicine and Bio-medical practices (Richter 2003: [sp]). The concept of the intervention is to provide a closed loop Healthcare system where the project becomes self sustaining within the Social conditions, Function of space and the Well-being of people This will be done by investigating the existing typologies of healthcare systems in South Africa and by combining both Traditional Medicine and Bio-Medicine. This could allow a better communication network to establish between the two disciplines and provide more information about heath and well being to the public. The intervention can become a framework for future health care establishments where a multitude of functions can operate under one roof providing affordable treatment and advice to...